PSAT Math Multiple-Choice Question 780: Answer and Explanation

Question: 780

What is the best estimation of the probability that a randomly selected 16-year-old from the sample would use texting as his or her primary method of electronic communication?

• A. 0.23
• B. 0.43
• C. 0.49
• D. 0.73

Correct Answer: B

Explanation:

(B) To find any probability, divide the number of successes by the number of chances. In this case, the number of successes is the number of 16-year-olds who prefer texting, and the number of chances is the total number of 16-year-olds:

This amount, 0.425, is approximately 0.43 as in choice (B).