PSAT Math Multiple-Choice Question 532: Answer and Explanation

Question: 532

The table below shows the maximum and minimum elevations in five counties in Missouri.

Elevation (in meters)

What is the mean maximum elevation, in meters, of the five counties shown?

• A. 201
• B. 201.4
• C. 258
• D. 258.4

Correct Answer: D

Explanation:

D

The question asks about the mean (average) of a set of numbers in a chart. Read the chart carefully to find the correct numbers, which are in the maximum elevation row. Use the formula T = AN, where T is the total, A is the average, and N is the number of things. The total is 239 + 289 + 329 + 240 + 195 = 1,292, and the number of things is 5. The equation becomes 1,292 = A(5). Divide both sides by 5 to get A = 258.4. The correct answer is (D).