Chapter 18 Probability Quiz

There are 10 boys and 12 girls in a class. If one student is selected at random from the class, what is the probability it will be a girl?

Brenda has 18 fish in an aquarium. The fish are the following colors: 5 orange, 7 blue, 2 black, and 4 green. Brenda's trouble-making cat has grabbed a fish. What is the probability the cat grabbed a green fish?

In problem question #2,

Same Senario (Brenda has 18 fish in an aquarium. The fish are the following colors: 5 orange, 7 blue, 2 black, and 4 green.)

what is the probability the cat did not grab an orange fish?

Katie spun a spinner 15 times and recorded her results in a table below. The spinner was divided into 6 sections numbered 1-6. The results of the spins are shown below.

-Based on the results, how many times would 4 be expected to appear in 45 spins?

• 9

• 12

• 15

• 21

Carrie bought a large basket of 60 apples. When she got them home, she found 4 of the apples were green. If she buys 200 more apples, about how many green apples should she expect?

• 8

• 13

• 20

• 24

Ben has a bag of 40 red triangles and 40 blue triangles. Without replacement, what is the probability of Ben choosing 2 red triangles?

• 0.20

• 0.25

• 0.30

• 0.35

• chocolate roll

• lollipop

• chocolate bar

• peanut butter

• purple

• green

• orange

• brown

In Florida, 94% of people have a TV. 71% have a TV and a DVD player. What percent of people that have a TV also have a DVD player?

• 66%

• 70%

• 83%

• 76%

A bag has 55 green marbles and 45 red marbles inside. if two green marbles are pulled from the bag at the same time, player one gets a point. If two red marbles are pulled from the bag at the same time, player two gets a point. If one red and one green marble are pulled out at the same time, both players get a point. Is this a FAIR game?

• NO. There are more red marbles than green marbles in the bag, giving player two an unfair advantage.

• YES, this is a fair game.

• NO. There are more green marbles than red marbles in the bag, giving player two an unfair advantage.

• NO. There are more green marbles then red marbles in the bag, giving player one an unfair advantage.