What is the minimum percentage increase in the mean of set X {-4, -1, 0, 6, 9} if its two smallest elements are replaced

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by BTGModeratorVI » Wed Dec 16, 2020 12:37 pm

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What is the minimum percentage increase in the mean of set X {-4, -1, 0, 6, 9} if its two smallest elements are replaced with two different primes?
(A) 25%
(B) 50%
(C) 75%
(D) 100%
(E) 200%

Answer: D
Source: Manhattan prep

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Source: Beat The GMAT — Problem Solving | Wed Dec 16, 2020 12:37 pm

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