Question

Your goal is to run a mean of 45 minutes per day for a week. For the first six days, you run 38, 40, 40, 42, 43, and 50 minutes. How many minutes must you run on the seventh day to reach your goal exactly?

A. 28 minutes
B. 62 minutes
C. 42 1/6 minutes
D. 17 minutes

Answer 1

B: 62

Explanation:

Answer 2

add 38, 40, 40, 42, 43, 50, and an unknown x representing the 7th day. divide the sum by 7. Equate this to 45. Then solve for x.

x = 62 minutes