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.

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.

Which of the following is a binomial experiment?

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

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

Rina spins the spinner below 30 times. A success occurs when the spinner lands on a number that is greater than 6.What is the probability of a success and a failure for this 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?

Franco has a hat with 9 blue marbles, 4 yellow marbles, and 12 green marbles. He designs a binomial experiment by drawing a marble from the hat, recording whether the marble is green, and then laying the marble aside. He then repeats the process seven times. Which statement must be true?

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?

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.