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题目
还有一道GMAT数学题
At a certain food stand, theprice of each apple is ¢ 40 and the price of each orange is ¢60. Mary selects a total of 10 applesand oranges from the food stand, and the average (arithmetic mean) price of the10 pieces of fruit is ¢ 56. Howmany oranges must Mary put back so that the average price of the pieces offruit that she keeps is ¢ 52?

A. 1
B. 2
C. 3
D. 4
E. 5
(为什么不选d,4个orange,6个apple,平均价格刚好是52呀)

提问时间:2021-03-17

答案
举一反三
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