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Probability DS

by GmatKiss » Sun May 20, 2012 9:32 am
One number, k , is selected at random from a set of 11 consecutive even integers. What is the probability that k = 10?

(1) The average (arithmetic mean) of the set is zero.

(2) The probability that k = 10 is the same as the probability that k = -10.
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Source: — Data Sufficiency |
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by GMATGuruNY » Sun May 20, 2012 1:51 pm
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