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Mean of 3 numbers with one number and the mean of 4 numbers

Source: 1993 AMC 8 Problem 15

June 28, 2011
AMC

Problem Statement

The arithmetic mean (average) of four numbers is 8585. If the largest of these numbers is 9797, then the mean of the remaining three numbers is
(A) 81.0(B) 82.7(C) 83.0(D) 84.0(E) 84.3\text{(A)}\ 81.0 \qquad \text{(B)}\ 82.7 \qquad \text{(C)}\ 83.0 \qquad \text{(D)}\ 84.0 \qquad \text{(E)}\ 84.3
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