GRE
Exam
Numerical Ability
Permutation and Combination
A survey was sent to 80 customers, 7 of whom responded. Then the survey was redesigned and sent to another 63 customers, 9 of whom responded. By approximately what percent did the response rate increase from the original survey to the redesigned survey? (A) 2% (B) 5% (C) 14% (D) 28% (E) 63%
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