IC: Ch. 10 Probability ReviewHW: Finish Review Packet

Must show work!Probability Test TOMORROW

Materials

1. Write the IC and HW in your planner.

Wednesday, 4/24/19

• Pencil & Grading pen • Slate/Marker/Eraser• Blood Type Prediction Tasks• Calculator

Directions: Copy and solve each problem.

1) -8 + 15 2) -4 - (-10)

7

8 -18

-4 + 10

6

3) -2(9) 4) -16 ÷ (-2)

Shaun has 5 coins in his pocket. If he empties the coins onto a table, what is the probability that all five coins will land on tails.

03125.0

1st 2nd 3rd 4th 5th

%125.3

T T T T T

1 2

1 2

1 2

1 2

1 2

1

= 32

B1, B2, B3

2) Slim’s cousin, Darlene, has five $1 bills, three $10 bills, and two $20 bills in her wallet because it was just her birthday and all she asked for was cash! She hit the mall and when it was time to pay for the new shoes she picked out, she reached into her wallet without looking and pulled out a $20 bill. Since the shoes were more than that, she left the $20 bill on the counter and reached in and pulled out another bill. What is the probability of her picking the two $20 bills?

1st Pick 2nd Pick

10

2

$20 bill

9

1=

2

90

$20 bill

x

You already picked one 20 dollar bill, so there is only one left. Also, there are now only 9 total bills sitting in the wallet.

022.0 %2.2

1

45

B1, B2, B3

What is the probability that Gertrude will draw a number less than 4 from a set of cards numbered 1-10 and roll a 2 on a six sided die?

6

1

10

3 05.0

1st 2nd Less than 4 Roll a 2

20

1

60

3 %5

B1, B2, B3

At this year’s Spring Fling there was a game in which you have a 0.3 chance of winning. If you play 20 times, how many times would you predict you might win?

B1, B4

You drew these tiles from a Scrabble bag. Using this data, how many tiles would you expect to be an “R” or a “B” out of the 105 tiles in the bag?

B4

Using your experimental probability, how many times would you expect to get a mixture (one heads and one tails) if you flip your two coins 525 times?

B4

The American Red Cross states that the probability of having any negative blood is 0.16. The population of the Tucson metropolitan area is 1,010,025 people according to our Google search. How many people would you predict to have negative blood in the Tucson area?

total

blood

16

100

x

1,010,025

16%

(1,010,025)(1,010,025)

1

x100

400,160,16

x604,161

We would predict that

Tucson has 161,604

people with negative

blood.

You grab some M&M’s out of a bag.

You get 5 red ones out of the 15 that

you took. If there are 75 M&M’s in the

bag, how many would expect to be

red?

#red

total

5

15

x

375x

15

You could predict

that there are 25

red M&Ms in the

bag.

75(75)(75)

25 x

1

The theoretical probability of winning

a Darth Vader bobblehead when

spinning a prize wheel is 15%. The

wheel has 3 bobblehead sections.

How many sections are on the wheel?

15

100

3

15x3

100

15x 300

You could predict

that there are 20

total sections on

the wheel, three

of which were

Darth Vader.

(Mu ha ha ha ha)

(100)(100)

#bobblehead

total

x(x)(x)

15 15

x 20

1

Slim Jim grabs a candy without looking out of his sister’s Easter basket. It was a blue raspberry and he hates that flavor (what?!) so he tosses it back in and grabs another candy without looking. This time it was watermelon, his favorite! If the probability of picking a blue raspberry is 0.2 and the probability of drawing a watermelon is 0.5, what is the probability that Slim will first pick a blue raspberry and then watermelon?

1st 2nd

raspberry watermelon

0.2 0.5x = 0.10 = 10%