stallone wrote:

E

A cant be as :

suppose x=8 so average of x and 10 = 9 also if z=9 (as Z is closer to 10)

z=avg of x and 10 , hence insufficient .

In this example, z is equidistant from x as well as from 10.....whereas the stmt says that z should be closer to 10 than to x.

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