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16OG/DS/14th 如下:
what was the range of the selling prices of the 30 wallets sold by a certain store yesterday?
(1) 1/3 of the wallets had a selling price of 24 each;
(2) the lowest selling price of the wallets was 1/3 the highest selling price of the wallets.
OG答案:E
我觉得是:C(1、2结合sufficient)
(1)说其中的10个钱包售价24/个,
(2)说最低价是最高价的1/3。
假设最高价是24/个,则最低价为8/个;假设最低价为24/个,则最高价为72/个;
综上,range:8≤售价范围≤72/个
大神NN在哪里,帮忙解答一下?
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