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### Show Tags

29 Sep 2011, 09:10
00:00

Difficulty:

5% (low)

Question Stats:

94% (01:35) correct 6% (00:46) wrong based on 20 sessions

### HideShow timer Statistics

A music store has 90 different CD's. If an average price is $12 per CD and 20 of the most expensive ones are$20 each, what is the average price of the remaining CD's?

A. 8.33
B. 8.75
C. 9.23
D. 9.71
E. 10.07

M06-33

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Re: A music store has 90 different CD's. If an average price is $12 per CD [#permalink] ### Show Tags 23 Jul 2018, 21:00 shrive555 wrote: A music store has 90 different CD's. If an average price is$12 per CD and 20 of the most expensive ones are $20 each, what is the average price of the remaining CD's? A. 8.33 B. 8.75 C. 9.23 D. 9.71 E. 10.07 M06-33 The sum of the prices of all CD's is $$90 * 12 = 1,080$$. The sum of the prices of the most expensive CD's is$400. So, $$1,080 - 400 = 680$$ is left for 70 remaining CD's. Thus the average price is $$\frac{680}{70} = 9.71$$

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