Probability Review

What is the probability of spinning an even number?

• 16 2/3%

• 33 1/3%

• 50%

• 75%

Jack tossed a coin three times. Which tree diagram shows all the possible outcomes of the coin landing heads up or tails up?

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The manager of a movie theater randomly surveyed 50 people who entered the movie theater on Friday. The results of the survey are shown in the table. Based on the results in the table, which statement about a person who will go to this theater next Friday is true?

• The person is three times as likely to prefer comedy as horror.

• The person is twice as likely to prefer drama as horror.

• The person is less likely to prefer horror or drama than action.

• The person is more likely to prefer horror or comedy than action or drama.

A number cube with faces labeled from 1 to 6 was rolled 20 times. Each time the number cube was rolled, the number showing on the top face was recorded. The table shows the results. Based on these results, what is the experimental probability that the next time the number cube is rolled it will land with 5 or 6 showing on the top face?

• 2/5

• 3/20

• 1/3

• 3/5

A certain event is an event...

• that has a probability of 1
• that is equally likely to occur
• that shows all results
• that almost always happens

Tags

CCSS.7.SP.C.5

Experimental probability is...

• the probability of a certain event occuring
• the total outcomes of an event
• the probability based on the results of a series of trials
• the probability of how likely an event might occur

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10
• 3/9
• 1/9
• 1/3

Tags

CCSS.7.SP.C.7B

If you flip 3 pennies how many possible outcomes are there?

• 4

• 6

• 9

• 8

What is the probability of drawing a Jack from a deck of cards, putting it aside, and then drawing another Jack?

• 1/221
• 1/68
• Other

A jar contains 8 marbles: 3 are red and 5 are blue. What is the probability of selecting a red marble, replacing it, and then selecting another red marble?

• 9/64
• 6/56
• 15/64
• 25/64