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[Problem Solving]
试题详情
题目：
At a certain food stand, the price of each apple is ¢ 40 and the price of each orange is ¢ 60. Mary selects a total of 10 apples and oranges from the food stand, and the average (arithmetic mean) price of the 10 pieces of fruit is ¢ 56. How many oranges must Mary put back so that the average price of the pieces of fruit that she keeps is ¢ 52?
选项:
A、1
B、2
C、3
D、4
E、5
答案:
E
提问：
算出来是六个橘子四个苹果均价52，为什么不选b
解答：
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提问：
算出来是六个橘子四个苹果均价52，为什么不选b
解答：
点赞0
阅读1107
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