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A certain car dealership has two locations. Last month, an [#permalink]

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22 Jun 2005, 16:15

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A certain car dealership has two locations. Last month, an average (arithmetic mean) of 11 cars per salesperson was sold at location A and an average of 16 cars per salesperson was sold at location B. What was the average number of cars sold per salesperson at this dealership last month?

(1) Last month, the number of salespeople at location A was 3 times the number of salespeople at B.

(2) Last month, the total number of cars sold at location A was 132, and the total number of cars sold at location B was 64.

Case 1) Salespeople @ A = 3x, Salespeople @ B = x Average cars sold per salesperson = [11*3x + 16*x]/[3x + x].

Sufficient

Case 2) Total cars sold @ A = 132, Total cars sold @ B = 64 # of salespeople @ A = 132/11 = 12, # of salespeople @ B = 64/16 = 4 Average cars sold per salesperson = [132 + 64]/[12 + 4].

Sufficient

Answer is D

gmatclubot

Re: DS: Average Car Sales
[#permalink]
19 Sep 2009, 08:19