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For a group of n people, k of whom are of the same GMAT, the (n-k)/n expression yields an index for a certain phenomenon in group dynamics for members of that GMAT. For a group that consists of 20 people, 4 of whom are females, by how much does the index for the females exceed the index for the males in the group?
(A) 0.05
(B) 0.0625
(C) 0.2
(D) 0.25
(E) 0.6
OA E
Source: Princeton Review
(A) 0.05
(B) 0.0625
(C) 0.2
(D) 0.25
(E) 0.6
OA E
Source: Princeton Review
