Probability and Making Predictions

Which of the following statements is true about the probability of spinning a blue?

• The experimental probability and theoretical probability are equal.

• The experimental probability is less than the theoretical probability.

• The experimental probability is greater than the theoretical probability.

• The experimental probability cannot be determined from the data.

• 1425
• 1475
• 1525
• 1575

You have three sticks. Each stick has one red side and one blue side. You throw the sticks 10 times and record the results. Use the table to find the experimental probability of tossing 3 blue.

• 2/5

• 2/10

• 1/5

• 3/10

Use the spinner to determine the theoretical probability of the event.

• P (purple) = 1/3

• P (purple) =1/4

• P (purple) =1/5

• P (purple) =1/6

Ben has a basket of 5 red balls, 3 yellow balls, and 2 green balls. What is the probability that the probability he randomly chooses will be red?

• 1/2

• 1/5

• 1/10

• 5/8

A fair number cube is rolled 60 times. The results of the experiment are shown. For which side of the number cube were the experimental and theoretical probability the closest?

• 2

• 5

• 4

• 3

Which of the following describes theoretical probability?

• Perform a situation and count the number of possibilities

• Use trials to count the number of desired outcomes

• Perform an experiment to determine the probability of an event

• Use a formula to determine the expected probability of an event

A bag of marbles has 8 red marbles and 6 purple marbles. Jennifer will randomly select 1 marble from the bag. What is the probability that she will select a purple marble?

• 6/8

• 3/4

• 6/14

• 3/7

Look at the dartboard. 
A boy is playing darts with his friends. What is the probability that his dart will land in an unshaded square?

• 12/25

• 13/25

• 10/25

• 11/25

Isidro flips a fair coin 40 times. How many times can he expect heads to appear?

• 4

• 10

• 15

• 20