Question

let a = the event of getting at least one defective calculator when four are randomly selected with replacement from a batch. write a statement describing event $overline{a}$. choose the correct answer below. a. the event of getting no defects among the 4 calculators. b. the event of getting at least 1 defect among the 4 calculators. c. the event of getting more than 1 defect among the 4 calculators. d. the event of getting 4 defects among the 4 calculators.

Explanation:

The complement of an event "at least one" is "none". Event $\overline{A}$ is the complement of event $A$ which is getting at least one defective calculator. So $\overline{A}$ is the event of getting no defective calculators among the 4 selected.

Answer:

A. The event of getting no defects among the 4 calculators.