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[讨论] Prep2 DS 69
69. 5791-!-item-!-187;#058&004570 At the bakery, Lew spent a total of $6.00 for one kind of cupcake and one kind of doughnut. How many doughnuts did he buy?
(1) The price of 2 doughnuts was $0.10 less than the price of 3 cupcakes.
(2) The average (arithmetic mean) price of 1 doughnut and 1 cupcake was $0.35.
Ans: E.
I could get Cupcake and doughnut each cost 0.16, 0.17 respectively, and since the number bought for each should be integers, shouldn't the problem solved with one solution?
Confused...
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发表于 2008-9-4 10:29:00
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