Question

determining the complement of an event
mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. what is the complement of mariah choosing three mysteries?
not choosing a mystery
choosing at least one mystery
choosing three mysteries
not choosing all mysteries

Explanation:

Step1: Define complement of an event

The complement of an event A is all outcomes that are not in A. Here, event A is choosing three mysteries.

Step2: Analyze the non - A outcomes

The non - "choosing three mysteries" outcomes mean not choosing all mysteries. It could be choosing 0 mysteries, 1 mystery, or 2 mysteries.

Answer:

D. not choosing all mysteries