PSAT Math Multiple-Choice Question 406: Answer and Explanation

Question: 406

What percent of the participants who experienced REM sleep during the study wore a contoured mask?

• A. 37.1%
• B. 47.6%
• C. 59.5%
• D. 62.4%

Correct Answer: D

Explanation:

D

Difficulty: Easy

Category: Tables and Graphs

Getting to the Answer: The question asks only about participants who experienced REM sleep, so focus on this row. Of the 125 participants who experienced REM sleep, 78 of them wore a contoured mask. This represents , or 62.4%, which is (D).