The average of 100 numbers is 6, and the standard deviation is D, where D is positive. When added which of the following numbers, the new deviation will be less than D?
A. -6 and 0
B. 0 and 0
C. 0 and 6
D. 0 and 12
E. 6 and 6.
I face difficulty in solving Standard deviation problems.Does anyone have good material on this.
Please solve this question
GMAT Prep - Standard deviation
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