Probability Review

P(C)=

• about 50%

• 6

P(vowel)=

• about 33%

• 3

P(not D)=

• 5

• about 0.63

What are the total number of outcomes in the sample space for...

picking a month of the year and tossing a coin?

• 2

• 12

• 14

• 24

What are the total number of outcomes in the sample space for...

rolling a number cube and tossing a nickel?

• 2

• 6

• 8

• 12

What are the total number of outcomes in the sample space for...

choosing a setting on 3 knobs of a washing machine: regular, delicate, or extra dirty; hot, warm, or cold water; regular rinse or extra rinse?

• 8

• 9

• 18

• 27

What are the total number of outcomes in the sample space for...

choosing a number from 1 to 10 and a day of the week?

(HINT: Use the Fundamental Counting Principle!)

• 10

• 17

• 63

• 70

A store is handing out coupons worth 10%, 15%, 20%, or 25% off. Each coupon is equally likely to be handed out. Which of the following models could be used to simulate this situation?

(HINT: Which one has the same probability as the coupons?)

• flipping a coin four times

• spinning a spinner with four equal sections

• rolling a number cube labeled one through six one time

• rolling a number cube labeled one through six four times

Bailey tossed a coin 10 times. The results were 7 heads and 3 tails.

What is the experimental probability of tossing tails?

Bailey tossed a coin 10 times. The results were 7 heads and 3 tails.

What is the best comparison between the theoretical and experimental probability of tossing heads?

• The theoretical probability is greater than the experimental probability

•  The theoretical probability is less than the experimental probability.

•  The theoretical probability is equal to the experimental probability.

•  The theoretical probability is not related to the experimental probability.