Binomial Distribution Answers

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

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?

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

Thirty-three percent of all students at a high school like beef stew. Out of 300 students, 40 are selected randomly and asked whether they liked beef stew. If liking beef stew is a success, what is the probability of a failure for this binomial experiment?

Aron flips a penny 9 times. Which expression represents the probability of getting exactly 3 heads?

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.

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

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?

Which of the following is a 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.