The mean of six numbers is 25. If one of the numbers is 15, what is the mean of other five numbers?

Mathematics
Tutor: None Selected Time limit: 1 Day

Multiple Choice:

A. 15 

B. 25

C. 27

D. 40

May 1st, 2015

If the mean of the other five numbers is x, then their sum is 5x. The sum of all six numbers is 5x + 15 or 25*6 = 150. We obtain an equation: 5x + 15 = 150, whose solution is x = (150 - 15)/5 = 135/5 = 27.

Answer: C

May 1st, 2015

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