A set consists of n positive integers arranged in decreasing order of value....

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A set consists of n positive integers arranged in decreasing order of value. If the difference between any two adjacent numbers of the set is 3, then what is the ratio of arithmetic mean of the set to the median of the set?

A. 1
B. 1.5
C. 2
D. 2.5
E. 3

Answer: A

Source: e-Gmat