Probability Practice

Which of the following describes theoretical probability?

• Perform a simulation and count the number of possible outcomes.

• 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 experimental probability?

• Number of possible favorable outcomes

• Total number of trials in an experiment

• Perform an experiment to determine the probability of an event

• Use a formula to determine the probability of an event

As the number of trials increase, the experimental probability will become closer to an event's:

• outcome

• sample size

• theoretical probability

• probability

The faces of a fair 6 -sided cube are numbered 1 through 6. The number cube is rolled. What is the probability it will land on a 2?

What is the theoretical probability that Jamya flips tails on her next flip of the coin? 

In a standard deck of 52 cards, there are 4 suits which contain 13 spades, 13 clubs, 13 diamonds and 13 hearts. Jordan selected a card at random with replacement. His results are listed in the table below. Based on the results, compare the theoretical probability of finding hearts to the experimental probability of finding hearts.

• The theoretical probability is greater than the experimental probability.

• The theoretical probability is less than the experimental probability.

• The theoretical probability is half the experimental probability.

• The theoretical probability and the experimental probability are the same.

What is the experimental probability of rolling a 5 on a fair number cube?

A bag contains 9 blue marbles, 10 red marbles, and 11 yellow marbles. What is the probability of randomly choosing a blue or yellow marble from the bag?

Alice is preparing for an archery competition. In order to receive a medal, Alice knows that she needs to score a “10” on the target. During practice for the competition, Alice scored a “10” four times, a “9” six times, and an “8” two times. Based on her practice results, which is closest to the probability that Alice will receive a medal at the competition?

• 40%

• 33%

• 83%

• 15%

In Mr. Brown’s classroom, 40% of the students are boys. If Mr. Brown chooses a student to answer a question in his classroom, what is the probability that the student he chooses is a boy?