Binomial Distribution Answers

Mrs. Gomes found that 40% of students at her high school take chemistry. She randomly surveys 12 students. What is the probability that exactly 4 students have taken chemistry? Round the answer to the nearest thousandth.

A researcher finds that 15% of all commuters in a metropolitan area take the train to work. The researcher polls 250 people in the area and asks them whether they take the train to work. What is the number of trials for this binomial experiment?

According to a poll, 30% of voters support a ballot initiative. Hans randomly surveys 5 voters. What is the probability that exactly 2 voters will be in favor of the ballot initiative? Round the answer to the nearest thousandth.

Dion flips a coin 20 times and records if it comes up heads. If getting heads is a success, what is the probability of a success on each flip?

Thuy rolls a number cube 7 times. Which expression represents the probability of rolling a 4 exactly 2 times?

Van guessed on all 8 questions of a multiple-choice quiz. Each question has 4 answer choices. What is the probability that he got exactly 1 question correct? Round the answer to the nearest thousandth.

Janie flips a coin 70 times and records if it comes up heads. If getting heads is a success, what is the probability of a failure?

How many outcomes are possible for one event of a binomial experiment?

Forty-four percent of the members of the Science Club wear blue shirts. Which of the following is a binomial experiment?

Two percent of mobile phones produced at a factory are defective. Which of the following is a binomial experiment?