PSAT Math Multiple-Choice Question 129: Answer and Explanation

Question: 129

What is the average cost of a child's meal?

• A. $26.80
• B. $23.45
• C. $13.20
• D. $7.90

Correct Answer: C

Explanation:

C

The question asks for the average cost of a child's meal. For averages, use the formula T = AN, in which T is the total, A is the average, and N is the number of things. Read the chart carefully to find the correct numbers to use. In the Children column, there are a total of 1,875 meals for a total cost of $24,750. The formula becomes 24,750 = A(1,875). Divide both sides by 1,875 to find that $13.20 = A. The correct answer is (C).