SSAT Math Question 509: Answer and Explanation
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Question: 509
3. Matt took a bike trip. On the first day he rode 15 miles. On the second day he rode 35 miles, and the third day he rested. On the fourth day he rode 57 miles, and on the fifth day he rode 43 miles. What is the average number of miles that he rode per day?
- A. 25
- B. 27
- C. 30
- D. 32
Correct Answer: C
Explanation:
C is correct. To find the average, add up the numbers and divide by the number of numbers. In this instance the number of miles Matt rode adds to 150. The number of days is 5, so the average number of miles per day he rode is 150 ÷ 5 = 30. Don’t make the mistake of dividing by 4 because on one day Matt’s number of miles was 0. That number needs to be used in calculating the average.