Probability Unit Practice

Name (First and Last)

Class Period

• 1st

• 4th

• 6th

• 7th

What is the probability of randomly selecting an odd number from the numbers 1 -15?

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Twelve students have an equally likely chance of being selected in a drawing at school. Eight are 7th graders and four are 8th graders. What is the probability that an 8th grader will be selected?

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The probability of a spinner landing on yellow is 1/4. What does 3/4 represent?

• A. P(yellow)
• B. P(blue)
• C. P(yellow’)
• D. P(purple and blue)

Marty can go to one movie on either Friday or Saturday. He will be able to choose either a comedy or an action movie. Which list shows all the possible outcomes of one movie on one day?

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A coin is flipped and a standard number cube is rolled. Which tree diagram represents this situation?

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In a game, the player wins if he rolls a 4 on a number cube. If the number cube is rolled 24 times, what is a reasonable prediction for the number of unsuccessful rolls?

A health study of 540 adults found that only 7 in 20 adults get enough sleep each night. Based on the results of the sample, how many adults got enough sleep?

• A. 27
• B. 35
• C. 189
• D. 202

Two coins are flipped. What is the probability that both coins land on heads?

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