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Median/Mean - GMATPREP

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Median/Mean - GMATPREP

by beater » Thu Mar 05, 2009 6:20 pm
if the average mean of the five numbers x,7,2,16 and 11 is equal to the median of the five numbers, what is the value of x?

1. 7<x<11
2. x is the median of the five numbers
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Source: — Data Sufficiency |
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by pakaskwa » Thu Mar 05, 2009 6:42 pm
Answer is D.

Stmt 1 says 7<x<11, it means x is the median. So we got:
2, 7, x, 11, 16
2+7+x+11+16=5x
x=9
Sufficient

Stmt 2 is exactly the same as stmt 1. Sufficient.
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