ISEE Mathematics Achievement Question 293: Answer and Explanation

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Question: 293

5. Anna ate 2 doughnuts on Monday, Wednesday, and Friday and ate 4 doughnuts on Tuesday and Thursday. She did not eat any doughnuts on Saturday or Sunday. What is the average number of doughnuts that Anna ate each day of the week?

  • A. 2.0
  • B. 2.5
  • C. 2.8
  • D. 3.0

Correct Answer: A

Explanation:

A Use an Average Pie to solve this question: . List the number of donuts Anna ate each day: Monday = 2, Tuesday = 4, Wednesday = 2, Thursday = 4, Friday = 2, Saturday = 0, and Sunday = 0. The question asks for the average number of donuts she ate over the course of all 7 days, so add all the donuts she ate: 2 + 4 + 2 + 4 + 2 + 0 + 0 = 14. Put 14 in the total spot in your Average Pie. The # of items is 7 since the question asks about the whole week. Finally, divide these two numbers to get the average: = 2. The correct answer is (A).

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