# Probability of Chance Events Word Problems (Grade 7)

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## Probability of Chance Events Word Problems

1.

A class contains 12 boys and 14 girls. The teacher calls on a student at random to go to the board. The probability that it is a girl is [math]7//13[/math].

- True
- False

2.

Teresa has 8 white pom-poms and 7 orange pom-poms in a bag. If she removes an orange pom-pom and does NOT return it to the bag, the probability that the next chosen pom-pom at random is white is [math]4//7[/math].

- True
- False

3.

A fair numbered cube with faces numbered 1 to 6 is rolled. The probability that a number other than 6 is rolled is [math]5//6[/math].

- True
- False

4.

In a game, Charlie is rolling a dice. Which best describes the probability of rolling an even number?

- Not Possible
- The same as the probability of rolling an odd number
- Less than the probability of rolling an odd number
- Greater than the probability of rolling an odd number

5.

A student is randomly selected from a class of 32 students. What is the probability that the selected student is a boy, if there are 20 girls in the class?

- 0.75
- 0.25
- 0.425
- 0.375

6.

Hernando placed 5 green crayons, 6 blue crayons, and 9 yellow crayons in a container. He will reach in and pull one out without looking. What is the probability that the crayon he chooses will be green?

- [math]0.20[/math]
- [math]0.25[/math]
- [math]0.30[/math]
- [math]0.33[/math]

7.

Five puppies are randomly selected for a test on behavior out of a group of 10 puppies. The puppies are selected one at a time and not returned to the group till after all the testing is done. If 60% of puppies are male, what is the probability that the first three puppies selected are female?

- [math]2.25%[/math]
- [math]3.33%[/math]
- [math]5.66%[/math]
- [math]8.50%[/math]

8.

Timmy has 3 red pens and 2 black pens in the bottom of his book bag. They are all the same size and shape. He randomly selects a pen to use and then puts it back in his bag. Later he randomly selects a pen a second time. What is the probability that he selects a red pen both times?

- [math]3//5[/math]
- [math]3//10[/math]
- [math]1//9[/math]
- [math]9//25[/math]

9.

A quarter is tossed two times. What is the probability that the coin will land heads up both times?

- 1
- 0.75
- 0.25
- 0.5

10.

Morgan has a bag with 7 red jelly beans and 3 black jelly beans. He will randomly select one at a time and eat it. If the first jelly bean he selects is black, what is the probability that the second one will also be black?

- [math]1//5[/math]
- [math]2//9[/math]
- [math]3//7[/math]
- [math]3//10[/math]

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