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A shopper spends $25 to purchase floppy disks at 50¢ each. T

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A shopper spends $25 to purchase floppy disks at 50¢ each. T [#permalink] New post 07 Nov 2019, 22:40
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A shopper spends $25 to purchase floppy disks at 50¢ each. The next day, the disks go on sale for 30¢ each and the shopper spends $45 to purchase more disks. What was the average price per disk purchased?

(A) 25¢

(B) 30¢

(C) 35¢

(D) 40¢

(E) 45¢
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Re: A shopper spends $25 to purchase floppy disks at 50¢ each. T [#permalink] New post 08 Nov 2019, 04:03
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The shopper spent $25, or 2500¢, on the 50¢ disks, he purchased 2500/50 = 50 disks. On the second day, the shopper spent $45, or 4500¢, on the 30¢ disks, and thus he purchased 4500/30 = 150 disks.

Thus, the average price per disk is (2500 + 4500)/(50 + 150) = 7000/200 = 35 cents.
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Re: A shopper spends $25 to purchase floppy disks at 50¢ each. T   [#permalink] 08 Nov 2019, 04:03
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A shopper spends $25 to purchase floppy disks at 50¢ each. T

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