ardz24 wrote:If m is the average (arithmetic mean) of the first 10 positive multiples of 5 and if M is the median of the first 10 positive multiples of 5, what is the value of M - m ?
(A) -5
(B) 0
(C) 5
(D) 25
(E) 27.5
For any EVENLY SPACED SET, mean = median.
The first 10 positive multiples of 5 constitute an evenly spaced set.
Thus, mean = median, implying that M=m and that M-m = 0.
The correct answer is
B.
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