Binomial Distribution

Question 1

Which of the following is a binomial experiment?

Revolt · Accepted Answer

A survey asking 75 people if they like the new school building

Question 2

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

Revolt · Accepted Answer

Selecting 200 phones randomly and recording whether each phone is defective

Question 3

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.

Revolt · Accepted Answer

0.309

Question 4

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

Revolt · Accepted Answer

Subscript 7 Baseline C Subscript 2 Baseline (one-sixth) squared (five-eighths) Superscript 5

Question 5

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?

Revolt · Accepted Answer

0.5

Question 6

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?

Revolt · Accepted Answer

0.5

Question 7

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

Revolt · Accepted Answer

Subscript 9 Baseline C Subscript 3 Baseline (0.5) cubed (0.5) Superscript 6

Question 8

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?

Revolt · Accepted Answer

250

Binomial Distribution Answers

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