Today's Slides: June 8

Here they are ...





To see a larger image of the slides go here. When you get there you'll see a button in the bottom right-hand corner that says [full]. Click it and the slides will display in full screen mode.

proBOBly should have done this sooner....

Haha morning of the the test! Not the best time to bob... Well this unit I'm feeling fairly confident in considering the amount of effort I have put into the homework in the exercises and on the blog. A couple of the questions are still worded trickely so I'm fairly certain that a 100% won't happen as I seem to go too fast and miss simple things in the questions on tests. So my goal for this test would be to take it slow and meticulously..... and still finish on time.

BOB IIIIIII

Hello once again, back for my seventh BOB. Well what can I say this unit was a little hard towards the end of the unit, because of the permutations and counting sections which were mixed together. Although I am a little uneasy about those types of questions i believe this test should not be that bad after all. Probability was simply just a concept you had to learn and once you had the hang of it you can challenge any problem you liked. This is why I believe the test should not be difficult, unless there are many counting questions, which I bet there are. So all in all i found this unit to be quite straight forward and not very difficult once the concept is learnt. Good luck to all and make sure to study hard, Probability Test tomorrow morning.

ProBOBility

Hello. It's me again with my bob. So I think that this unit is a pretty straightforward unit. The situations and concepts are easy to understand and the content in the exercises is pretty straight forward. The only problem that I have is that the tricky questions that Mr. K gives us that throws us off. Hahaha. Very Tricky. But at least I get the unit. Haha. So Hope for the best, and everyone do good on the test. Good luck, so long, have fun studying. Cause I am. Haha.

SECOND LAST BLOG?!

Sorry I just posted now. I had work and i just got off. Anyways....Probability what can I say? Its true its the easiest unit but its hard to write down on the paper because there's so many ways you can do it and its hard to decide which one is right. I didn't really like probability ever since junior high well ever since I knew what it was. But whenever we work on problems in class I start to like it more and actually get it. Hmm ... well this is long enough. I'll leave it as it is and study!

GOODLUCK EVERYONE ON THE TEST TOMORROW!

Blogging on Blobbing

Well, this unit about probability started off as relatively easy....then it became a lot harder. The quizzes were sort of a wake up call to me that i need to study more and finish this year strong. I really need to study more on this unit because ever since junior high i struggle on probability. I wish all the best to everyone. Good luck on the test and hopefully we all do well!

Probability Pre-Test

Hello, i am the class scribe for this evening. We started today's class with a pre-test, because tomorrow is our long awaited test on probability. Basically the Pre-test had lasted almost the full class, because many of the students had questions about the questions on the pre-test. So to not get carried away here are the questions and the solutions to the pre-test questions.

question #1: Twelve people including you are members of the choir. The choir director is going to choose three members to attend a workshop. The probability you and two other members will be chosen is:
a. 1/4 b. 3/10 c. 1/12 d. 1/10

The answer is 1/4, because you are going so it is 1 * 11c2, because there are 11 members left and the director needs to pick two of them. It is all over 12c3, because it is over all the possibilities. So once that is calculated it is 1/4.

question #2: Rex is playing a guessing game. The probability he will guess each question correct is 0.3. What is the probability he will guess exactly 5 out of 10 questions correctly?
a. 0.15 b. 0.10 c. 0.29 d. 0.80

The answer is 0.10, because he must get 5 out of 10 questions correct so it is RRRRRWWWWW.
So it is 10!/5!*5!, because there are 5w's and 5r's. Then the 10!/5!*5! is multiplied by (0.3)^5*(0.7)^5 which is the binomial theorem. So once it is all worked out you achieve the answer of 0.10.

question#3: You choose 4 digits from the numbers (0-9), with no repeated digits. To win a prize only two numbers need to match the four selected by the computer.The probability, correct to the nearest one hundredth that you will win a prize.

The answer is 54.76%, because you must take the amount of numbers you are able to match with the computer to win a prize in this case 4c2, 4c3, or 4c4 numbers and divide them over all the possibilities which is 10c4, and add them all up. Once added and reduced it should give you a fraction:23/42, which is 54.76%.

question#4: The serial number of a $10 bill contains 8 digits. If your $10 bill contains the digit 7 at least once, you win a prize. What is the probability that your $10 bill will win?

The answer is you must find the probability of when there are no 7's and then you take the complement. So no 7's is basically 9 out of the possible 10 numbers to the exponent (^) of 8, because there is 8 digits. It gives you an answer of 0.4305, so to get the probability that there is a 7 you must take the complement, so 1 - 0.4305 = 56.95%. which is the answer.

question#5: Jeff takes a lunch to school on two days, and on the other three days he buys it. If he takes lunch he is late for his fourth period class 15% of the time, but if he buys it, he is late 35% of the time.

A) what is the probability that Jeff arrives on time?

The answer is that we take percentages of the two times he arrives and add them together to form the answer. So P(o) = P(to) + P(bo) = (0.4)(0.85) + (0.6)(0.65) = 73% which is the answer.

B) If Jeff was late, what is the probability that he took his lunch to school?

The answer is that you must take the probability he was late and took his lunch to school divided by the time he was late and brought his lunch plus the time he was late and bought his lunch. (0.4)(0.15)/(0.4)(0.15) + (0.6)(0.35) = 2/9 or 22.22% which is the answer.

So he is all of what we had done in class to day, when viewing this scribe post make sure to check the slides if you are confused, because it may help you find the way I had shown the answer. Make sure to study because tommorow is our Probability Test.


Tommorow's scribe is Robert P.

BOB

Another unit done and I'm starting to see a trend. As we start the unit, the concepts and questions seem to be quite easy to grasp for everyone, especially with this Probability unit. However, once the pre-test approaches most of us (from the classes reaction, correct me if I'm wrong) seem to be surprised at the complexity of some of the questions. Whatever it may be, the only way we can possibly improve upon that is study, study and study. Exams are coming very soon and we only have one unit left. Let's finish this year off strong. Good luck on the test tomorrow everyone.

BOB # 7

Hello to everyone yet again. Wow probability has come and gone and the test is tomorrow. This unit started off pretty easy and then it just got harder. On today's pre-test I found question 3 really difficult. To get through this though I will study tonight and try to do well on the test tomorrow. I wish the best of luck to everyone! See yah tomorrow!

BoB

Well to start off this unit was simple...It seemed like a piece of cake, but right now that point of view that I have just changed... This unit is really difficult, it requires a lot more thinking than I thought it would. The way the questions are worded and the solutions that seem to be the exact opposite of what you do... It's either you over think or under think how to answer the question...

Well the test is tomorrow and I am NOT looking forward to it. I don't feel that I'm ready for it. But there's nothing I can do about it... :P... Oh well I'll just say good luck to everyone... :P

BOB

Hello everyone! Once again, we have finished another unit of our course. Probability has been a very interesting unit because it practices your thinking skills. For me, figuring out chances on how a certain thing will occur is pretty cool. I found the "Tree Diagram" very interesting because it shows you the sample spaces of a certain event.

I hope everyone will do well on this test. This is our 2nd last chance to improve our test marks... -_-

Good luck y'all!! XD

Today's Slides: May 28

Here they are ...





To see a larger image of the slides go here. When you get there you'll see a button in the bottom right-hand corner that says [full]. Click it and the slides will display in full screen mode.

Probability

Friday is grueling days ever because of 2 unexpected quizzes from Mr.K

First we started-off with this. The very first thing to do is to make a tree diagram and fill out the probability for each cases .The probability that Tony will move to Winnipeg is 2/9, and the probability he will marry Angelina if he moves to Winnipeg is 9/20, all you need to do is to multiply to the probability that Tony will move to Winnipeg and marry Angelina.To get this, all you need to do is to multiply the probability that he is moving to Winnipeg which is 2/9 and the probability that he is not marrying Angelina 11/20.
To get this multiply the probability that he is staying which is 7/9 and the probability that he is not marrying Angelina which is 19/20.This is the probability of drawing four aces in a standard deck of fifty-two cards.
This is the probability of drawing diamond cards.
This is the probability of drawing an ace and a diamond.
All you need to do is to add the probability of drawing four aces and diamond cards, then subtract the probability of drawing an ace and a diamond.To answer this question, you need to make a Venn Diagram. Then from that diagram you will see that ten out of twenty-five students doesn't like either Dr.Pepper or Diet Dr.Pepper.

This is the probability of choosing two green dresses out of six.
This is the probability of choosing four dresses out of nine.
This is the probability of choosing six dresses out of fifteen.
All you need to do is just by dividing the favourable cases over the possible outcomes.

First thing is to make a tree diagram and fill out the probability for each cases. Next is to get the probability of an SUV that has air conditioning and divide it by the probability of having a passenger car that has air conditioning plus the probability of an SUV that has air conditioning.

To get this, just add the probability of drawing a defective blade first and then a good blade and the probability of drawing a good blade first and then a defective blade.
For the 1st question, you can't use the number 0 as the first digit, so you nine choices left.
The 2nd digit, you can't pick the same number that you use before so you have nine choices left. The 3rd digit , you can't pick the same number that you use for the 1st and 2nd digit, so you have 8 choices left. The 4th digit, you can't pick the same number that you use from the previous three, so you have 7 choices left.

For the 2nd question, just divide the possibility of having an odd number by the total number of possible digits.

For the 3rd question, break the question into 2 steps,one is that ending in zero and the other is ending in 5, then add both . Then divide the answer by the total number of the possible digits.

To get this, get the probability of getting exactly four hits out of 6 throws. Then, raise the probability of hitting to the fourth power and then the probability of missing to the second power.

That's it folks.By the way we have a pre-test tomorrow,sorry for the late scribe .The next scribe is DINO.

BOB-ing 7

I'll go straight to the point. The Probability Unit evokes chaos in my mind. In short, probability is one of those units in Math that makes me go, "WHAAAT?!" It may not seem like it because I don't do it in class. But seriously, in my head, I do it a lot. I grasped the concept easily. However, the application of that concept is the real puzzle to deal with. Maybe, the struggle originates from lack of practice and absence of confidence with myself. Like in the last quiz, I doubted myself so much that I erased the solutions for two questions that transpired to be correct. That was really... KJ (kill joy). Another frustration dawned upon me as the week concluded and the weekend commenced. I promised that I would be practicing during the weekend, but I failed to such a thing. Some problems throw me off because of too many disturbances. I really hope that I do well in this test, but not without a lot of practices. Maybe I should start after this BOB! Anyway, this year is about to end and I couldn't ask for more with a fun class already at hand. But, it's so fun that sometimes my attention linger over other topics. My BOB ends here and I hope you all had a great weekend and good luck on the upcoming pretest and test! See you guys tomorrow!

I hope that all my practices will pay off. Good luck guys! I know I need that too! HAHA!

BOB 7

Well, I thought that this probability unit was kinda easy. When we had the quizzes, I was surprised! It was hard, and that led me to think that I needed more practice for this unit. I'm just hoping that the test won't be as quite difficult as the quizzes. Those quizzes really got me surprised. Anyway, I wish everyone luck in the test, we're going to need it.

B O B

Hrm, yet again it's time to blog. This unit went by quite fast. During the beginning of this unit, the problems were without a doubt easy and included no difficulties for me. However, as we progressed, I found that there were questions (such as those on the quiz) that surprised me.

On the otherhand, I should've been more responsible for completing more of my exercises than I have. I found that since I did not practice as much, I struggled at times and found that I was stuck; not knowing what to do next on certain questions.

Truthwise, I will "try" to do more practice questions tonight and we'll see how I fair on the pre-test and test.

Good luck everyone on the pre-test and test this coming week!

BBOOOOO for BOB

So apparently we have a test on Monday ... wasn't in class on Friday unfortunately for the quiz. This unit that people call "probability".. is the story of school life. This is the unit i dread every year. This unit Probability was so difficult, hands down this has to be the hardest unit . I honestly wish we had like an extra week so i can actually take the time to understand this unit a bit more, i know for sure this is going to be my worse unit yet.
But, for everyone else Good Luck because i know you'll all need it just as much as i will.

Boron-Oxygen-Boron

I almost forgot to bob for the upcoming probability test until I checked the blog and saw Sandy's. And to iterate Sandy's statement, the provincial exam is only 2 weeks away! I can't believe that we've blown through the year in almost no time at all (well at least it felt like that) and what a blast it's been. Though I'm feeling really down because of all the cruddy marks I've been getting recently, but I've really enjoyed this course so far. This was the first class which presented a functional lesson solely integrated upon the smartboard. But enough about reflecting over the entire year, this bob's supposed to be about just this unit xD. This unit of course was probability. This unit wasn't terribly difficult and didn't present a lot of tribulations, especially seeing as the final portion of probability incorporated one of our previous lessons: combinatorics. Just remembering that a probability can be found by dividing the amount of favorable outcomes by total amount of outcomes is how you arrive at the wanted probability. Well this unit was very relaxed and somewhat straight forward, but as Mr. K left us (made me sad )= ) we were responsible for our own learning, and showing by my quiz marks, I wasn't exactly a very reliable worker. But as for the rest of the unit, there wasn't really anthing new that was unique to other units except for the exciting colloquy we had with Eddie's class in Georgia! It was quite a surreal experience, seeing as it's quite intriguing to converse with people from other regions of the world. I think we were all excited to chat with the class over in Georgia, and when the day came, we really enjoyed it. I think it was quite an extravagant episode in our bevy of pre-calculus memories. But with that said, I can't wait for further conversations from the class over in Georgia. This was my bob, good night everyone. As for the test:

I WISH EVERYONE GOOD LUCK ON THE PRE-TEST AND TEST!!!

99.9 BOB FM! (8)

Every single time I arrive on our blog I think about how close the provincial exam is. 2 weeks from tomorrow! It's really time to start studying. As for this unit, I didn't do great on my quiz, but the mistakes were really dumb. -_-" As soon as I seen the correct answer I realized I had made a stupid mistake. Regardless of the quizzes, I think this unit is pretty straight forward and not that difficult at all. I hope to do as good on this test as my logs one. (: Hopefully everyone else does really good as well. Good luck to everyone with the up coming test! <3

Today's Slides: May 25

Here they are ...





To see a larger image of the slides go here. When you get there you'll see a button in the bottom right-hand corner that says [full]. Click it and the slides will display in full screen mode.