873 Math Blog

Today in class :

We had to answer the questions from the math textbook.

I have to do question # 5 so here it is.


5. Raoul spins the pointer on each spinner. Find the probability of each event.

The total possible outcomes for this problem is 10 (5x2=10)

a) Green and A2

The answer for a) is 1/10=0.1. 0.1x100 = 10%

b) Red And an even number

The answer for b) is 2/10=1/5=0.2. 0.2x100 = 20%

Today in class we :

We went over 3 of the questions from yesturdays math sheet

# 3 from the back page

P(E and 20)

cube has 6 sides spinner has 6 sides



6x6 =36


TPO= 36






FO/TPO =5/36 = 0.138 = 13.8 %

#4


P(13 and H)

6 sides on the cube

8 sides on the spinner

6x8=48

TPO=48







FO/TPO= 4/48=1/12=0.08= 8.3%


# 7





P(a number less than 24 and not f )





6 sides on the cube


5 sides on the spinner


6x5=30







FO/TPO= 2/5=O.4= 40%

Then after that we did textbook questions in our notebook about independent probability

TPO on their OWN!

We did question 6 together

P(blue then red)

Blue FO/TPO = 1/10

Red FO/TPO = 3/10 add together TPO is now 20 then add the top parts so the answer is 4/20 =1/5 =20%

P(red then spots )

Red FO/TPO = 3/10

Spots FO/TPO =3/10 add together =3/ 20 = 3/10 = 30%

P( strips then blue)

Strips FO/TPO = 3/10

Blue FO/TPO = 1/10 add together 4/20 = 1/5 =0.2 = 20%

p(blue or red then spotted)

Red and blue FO/TPO 4/10

Spotted FO/TPO 3/10 add together 7/20=0.35 =35%

Here is Number Seven from the textbook

A. Bart FO/TPO = 1/6

Bethany Fo/TPO = 1/6 add together 2/12 =0.16 =16.6%

B. Bart FO/TPO = 1/6

Bethany FO/TPO = 1/6 add together 2/16 = 0.16 16.6%

C.Bart FO/TPO =5/6

bethany Fo/TPO= 3/6 add together 8/12 = 0.66 =66.6%

D. Bart FO/TPO = 3/6

Bethany FO/TPO =3/6 add together 6/12 = 0.5 = 50%

E. Bart FO/TPO = 3/6

Bethany FO/TPO = 3/6 add together 6/12 = 0.5 =50%

For The next scribe i choose simran. Thanks and please leave a comment :)

The next for scribe is Karrel E.

Today in class we did the following

1. Go over #10, #4, #13 on the work sheet: Which Italian Insects Often Fall in Love?
2. We did another worksheet, but we didn't finish it in class so it's for homework.

Worksheet: Which Italian Insects Often Fall in Love?

Some people had some trouble doing question #10, #4, #13 so Mr. H showed us the solutions.

I'm going to show you how to solve number 10 letter A. If you spin the spinner 600 times, about how many times would you expect it to stop on: a. $1, b. $5, c. $10.

A) P= FO/ TPO

6/12 or 1/2 or 50% Fifty percent of 600 is 300 so 300 is the answer.

The second thing we did in class was the work sheet. I will show you 4 questions on the first page.

#8 A number from 9- 20 is drawn at a random. Express the probability as a percent.

P ( a number divisible by two)= FO/TPO, 6/12 or 1/2 or 50%

9,10,11,12,13,14,15,16,17,18,19,20 TPO

10,12,14,16,18,20 FO

The answer is 50% percent

#10 You roll a number cube numbered from 1-6. Express the probability as a decimal.

P (2)= FO/ TPO, 1/6 or 0.17

1,2,3,4,5,6 TPO

2 FO

The answer is 0.17

#12 A jar contains 4 pink, 11 green, 19 blue, 6 violet marbles. A marble is drawn at a random. Express the probability as a percent. Round to the nearest percent.

P (not green)= FO/ TPO, 29/40 or 73%

All of the marbles TPO

29 marbles are not green FO

The answer is 73%

#14 A jar contains 11 navy and 12 white marbles. A marble is drawn at a random. Express the probability as a decimal. Round to the nearest hundredth.

P (white)= FO/ TPO, 12/23 or 0.52

All the marbles TPO

12 marbles (white) FO

The answer is 0.52

On the other side of the sheet there is another set of questions I'm going to show you two of them.

#5 You flip a coin and toss a 1-6 number cube.

P (not tails)= FO/ TPO 1/2

P(not 3)= FO/ TPO 5/6

Then I multiply the two fractions together 5/6 x 1/ 2

6 x 2 is 12, 1 x 5 is 5 so it's 5/ 12

That's how I solve it. I know it is right but, I think Mr. H wants us to do a probability tree. Sadly I didn't, I took a shortcut.

#6 You roll a number cube numbered 1-6 You then spin a spinner with 4 sections each with a different color. The spinner has the colors pink, red, white, and gray.

P(2)= FO/ TPO 1/6

P (white)= FO/ TPO 1/4

Then I multiply the two fractions together 6 x 4 is 24, 1 x 1 is 1. So the answer is 1/24. Another shortcut.

For the next scribe I choose Shaneille. Thanks! And PLEASE LEAVE A COMMENT!

Today in class, we pretend that a cup and a colorful cube inside it is a gumble machine. We had to guess what color would come out the most.

There are four blue cubes, three yellow cubes, two green cubes, and one red cube.

Theorotical Probability

red cube = 10 %
1 x 10 = 10 %

green cube = 20 %
2 x 10 = 20 %

yellow cube = 30 %
3 x 10 = 30 %

blue cube = 40 %
4 x 10 = 40 %

Favourable outcome / Total possible outcome



Experimental Probability

red cubes = 11/100
yellow cubes = 15/100
green cubes = 25/100
blue cubes = 49/100

favourable outcome / total possible outcome

( the more you get experiment the more closer you get to theorotical probability )




Today in class, we played a game called "is it fair?". Let me show you how to play the game.

First, you have to find a partner and you can choose whichever you want to be. A player or an opponent.

Today in class, we talked about Theoritical and Experimental Probability.

Theoritical Probability

Red 1gumball 10%, Yellow 2 gumballs 20%, Green 3 gumballs 30%, Blue 4 gumballs 40%

Favourable outcomes/Total Possible Outcomes

Experimental Probability

Red 11/100, Yellow 15/100, Green 25/100, Blue 49/100

Favourable outcomes/Total Possible outcomes
What Happens
The more you get experiment the more closer you get to Theortical probability.

Next we were given a sheet that talked more about probability. It was called "Which Italian Insects Often Fall in Love?" Here are 3 questions that I choose numbers 2, 4, and 6.

#2. Find the probability if you spin the spinner once.
a) Probability (even number) = favourable outcomes/total possible outcomes = 4/10 = 2/5

b) Probability (odd number) = Favourable outcomes/total possible outcomes = 5/10 = 1/2

c) Probability ("A") = Favourable outcomes/total possible outcomes = 1/10 = 10%

#4.

If you roll a regular 6 face die 1200 times, about how many times would you expect to get a 4?

Favourable outcomes/total possible outcomes = 1/6 = 0.1666 *100 = 16.666%


#6.

Find each probability if a raindrop falls on th tiles.

a) Probability (falling on black) = Favourable Outcomes/total possible outcomes = 9/25 =0.36 * 100 = 36%

b) Probability (falling on white) = Favourable outcomes/total possible outcomes = 16/25 = 0.64 * 100 = 64%

c) Probability (falling on green) = favourable outcomes/total possible outcomes = 0/25 = 0.0 * 100 = 0%

For homework we had to finish the "Which Italian Insects Often fall in Love" work sheet.

For next post I choose Angela. So I'm done and could everyone please leave a comment and tell me how I did. Thank you!

Ok this is what happened in class today:

We played this game with a die in a die. I know some of you might not understand but I actually found a picture on google :


Okay, here is how you play the game:

Wait! Before you play answer this question - Is this game fair? why?
Okay heres how you play:

1. you have a player and an opponent
2. both players start with 10 points
3. only the player gets to roll the die
4. if the player rolls a 7 he gains 3 points and the opponent loses 3 points
5. if the player rolls anything different from a 7, the player loses 1 point and the opponent gains 1 point
6. you are only allowed 10 rolls
7. if either the player or opponent loses all of his or her points, they automatically lose
8. play 10 games to see who wins the most

Okay, now that you know how to play, you have to answer these questions:
1. Who wins the most? Why?
2. Think Probability
3. Is this game fair?

Here is an example of a game:


Okay I think thats what we mostly did in class because we had bus ridership in the middle of class so we missed a little bit :)


So for the next scribe post I would like :


JUSTIN P.


to do the next scribe post. Thanks! Comment .

Today, in class, we played a game and I think it was called 'Is This Fair?' It didn't exactly have a title. Anyway, before playing we had to read the rules and have an answer to the question 'is this game fair?'


How you play is there's a PLAYER and an OPPONENT. They both have 10 points. There's a pair of dice. That's 2 of them.


The player is the only one that can use the dice. According to Mr. Harbeck, the opponent just smiles and records the scores.



You roll the dice 10 times.

If the PLAYER happens to roll a 7, the PLAYER gets 3 of the OPPONENT's points.

If the PLAYER rolls anything else, the OPPONENT gets 1 point from the PLAYER.

We were supposed to do this game 10 times and see who had the most wins.


--We were called to Bus Ridership--


After the bus ridership, we were asked:


Who won most? Why?
Think probability.
We were asked a second time, is this game fair?

We're supposed to write the answer in our "handy-dandy" notebooks... I think. Either there or on the back of the paper of the game.


I choose Kristin to do the scribe tomorrow!