Probability Test Review

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 spinner is spun and the results are shown in the chart. 
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.

Which of the following describes experimental 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

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 spinner has 5 sections of equal size labeled P, Q, R, S, and T. The arrow of this spinner is spun 15 times and landed 4 times on the section labeled Q.
Which statement best describes the experimental probability and theoretical probability of the arrow landing on the section labeled Q? 

• The experimental probability is 4/15, and the theoretical probability is 1/5.
• The experimental probability is 1/5, and the theoretical probability is 1/5.
• The experimental probability is 4/15, and the theoretical probability is 4/15.
• The experimental probability is 1/5, and the theoretical probability is 4/15.

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

A bag of candy contains 2 packs of Skittles, 4 Twizzlers, and 10 Reese's cups. What is the probability of reaching into the bag and choosing either a pack of Skittles or a Reese cup?

• 3/4
• 1/4
• 3/8
• 1/8

An ice cream parlor has six different flavors. They have 4 toppings and 2 types of cones. How many possible ice cream combinations are there?

• 24
• 48
• 6
• 12

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

When calculating experimental probability, as more trials are conducted, the experimental probability generally gets closer to the theoretical probability. Eventually, the experimental probability will equal theoretical probability. 

• True

• False