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A certain electronic component is sold in boxes of 54 for $16.2 and in boxes of 27 for $13.2. A customer who needed only 54 components for a project had to buy 2 boxes of 27 because boxes of 54 were unvailable. About how much more did the customer pay for each component due to the unvailability of the larger boxes ? A $0.33 B $0.19 C $0.11 D $0.06 E $0.03 答案B 黃色部分說總共要買54雙鞋子 大號的鞋子只能買到52個 所以買2個小號的鞋子 湊足54雙 而藍色部分是說 買了52雙大號鞋子+2雙小號鞋子 比原來全部買54雙大號鞋子 平均貴多少 但是小號鞋子明明比較便宜 怎麼會比買全部大號鞋子還貴呢 ? 請問哪裡錯了呢 ? hum......  |
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