Bunuel wrote:
Three shops that belonged to a chain were closed, and as a result the average (arithmetic mean) annual revenue per shop in the chain grew from $150,000 to $225,000. If the number of shops in the chain before the change was 8, approximately, what was the average annual revenue of the shops that were closed?
A. $25,000
B. $37,500
C. $58,333
D. $75,000
E. $91,666
[(8)($150,000)-(5)($225,000)]/3=$25,000
A
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