Scribepost for March 12,2009

I am going to do the Scribe post for Thursday because Caitlin was sick.

On Thursday we started by doing what we always start with.Number Of The Day
Thursday's number was 1247.936


On Thursday we had a test about probability. Here are the answers:
1.True 6. A 11.C 16.D 2.False 7. D 12.C 3.False 8.D 13.B 4.False 9.D 14.A 5.True 10.B 15.C

17.Favourable Outcome
18.Outcome
19.Tree Diagram and Probability Chart or Table
20.One Half
21.Tree Diagram
22. 1/25
23.Independent events

24.B 29.
25.A
26.D
27.E 30.They have an equal amount of winning.
28.C

After we did the test we copied some notes about probability.
This is what they said(or at least what I wrote. (= ).
More Probability
P(Rolling Prime Number) with a regular die.

P(Rolling Prime Number)=
Favourable outcome
---------------------------
Possible outcome

P(Rolling Prime Number)= 3/6 we always have to simplify so 3/6 is 1/2, 50% and,1:2

Find the probability of rolling two sixes in a row with a regular die.
You need to use a probability tree to solve this problem.




P(two sixes in a row)=
favourable outcome
----------------------------
possible outcome _
P(two sixes in a row)=1/36,2.78, 1:36

Independent Event- The outcome of one event has no effect on the outcome of another event.

Sample Space- All possible outcomes of an experiment.

Tree Diagram- Diagram used to organize outcomes

Find The possibility of landing a coin on HEADS, and rolling an ODD number.








P(odd and heads) =
favourable outcome
----------------------------
possible outcome
P(odd and heads)=1/4,1:4,25%



I know that the font is too big and messed up but i don't know how to fix it.So im just going to post it like this.


For the next Scribe Post i pick Jex M. But if someone didn't do the Scribe Post yet you should tell me.

Thank you for checking my scribe please leave a Comment.

Scribe post for march 5, 2009

This math class we did number of the day, probability test , and Mr. Isfeld taught us more about probability

This are the questions of the math test and their answers.

True/False

1. There is an equal probability of picking a red card or picking a black card from a full deck of 52 cards. Answer: true.

2. Using a six-sided die, the probability of rolling an even number is 1:3. Answer: false.

3. Using a six sided die the probability of rolling a 5 or a 6 is 1:2. Answer: false.

4. If there are fewer "favourable outcomes" the probability increases. Answer: false.

5. The formula for determining probability is = all outcomes over favourable outcomes Answer: false.

Multiple Choice

6. The probability that an event happens is 4:12 what is the probability that the event will not happen. Answer: 8:12.

7. What is the probability of drawing a red face card ( i.e., king, queen, or jack ) from a full deck of playing cards?. Answer: 6:52.

8. If you spin this spinner 30 times, how many times might you expect it to land on red?

Answer: 10 times.

9. There are 14 marbles in a bag: 4 red, 4 orange, 5 green, and 1 blue. You take out one marble out of the bag. What is the probability of getting a red or a blue marble? Answer: 5: 14.

10. Each letter of the word PROBABILITY is written on a separate card and placed in a bag. Fareshta draws one card from the bag what is the probability of her drawing a B? Answer: 2:11.

11. A _________ is a successful result in a probability experiment. Answer: favourable outcome

12. The expression "50-50 chance" means a probability of _______ percent. Answer: 50%.

This is an example of probability which Mr Isfeld taught us more about a while ago.

What is the probability of hitting heads while flipping a coin and rolling 3 on a normal six sided die.

probability tree/diagram.

Answer: favourable outcomes

___________________

possible outcomes

= 1: 12.

I pick Owen to do the next scribe post.

Scribe Post, March 4, 2009

Today in Math, we did Number Of The Day, as usual. The Number of the Day is 7791.692. We also continue doing Probability.

Probability continued

Outcome means one possible result of a probability experiment.

Favourable outcome means a succesful result in a probability experiment.

Examples:

The tiles S, N, O, and W are placed in a bag. What is the probability of drawing a letter W from the bag?
Another way to write this question is P(W).

1. P(W) = favourable outcomes
over
possible outcomes

P(W) = 1/4

If they ask you in a sentence you must answer in a sentene too.
The probability of drawing a W is 1/4, 25%, or 1:4.

2. P(S or O) = favourable outcomes
over
possible outcomes

P(S or O) = 2/4

You always need to simplify your answer.

P(S or O)= 1/2

P(S or O) =1/2, 25%, or 1:2

Homework:

The letters M, O, U, N, T, A, I, N are in a bag.


A. Probability of drawing a letter N

B. P(consenants)

C. P(letter)




I pick Charlie to do the next scribe post.

scribe post febuary 6

Today we did provincial folders: Mental mathematics

Today we did mental math, we got a worksheet with several questions that we had to solve in our heads for example:

- 50 x 40 = 2000

We also had to explain the steps we used to get the answer like:

- multiply 50 by 10, 4 times which equals 2000

- 50 x 10 (= 500) x10 (=1000) x10 (=1500) x 10 = 2000

Today's homework is:

Make algebraic equations for addition, subtraction, multiplication and division where the letter or variable equals six then solve and verify your own questions.

- for example -
a / 3 = 2

a /3 x 3 = 2 x 3

a = 6

Verify
a / 3 = 2
6 / 3 = 2
2 = 2

I choose LAYTON for the next scribe post