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On a certain transatlantic crossing 20% of a ship's passengers held round-trip tickets and also took their cars abroad the ship. if 60% of hte passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship passengers held round-trip tickets? A 33又1\3 B 40% C 50% D 60% E 66又2\3
我的理解是 在某个横渡大西洋的横渡中,20%的乘客选择的是往返票并携带他们的汽车。如果有60%的人是往返票但没有携带汽车,那么有多少百分比的乘客是往返票? 怎么做?对于这种比例的问题,我一直都很棘手,有哪位大侠能帮忙总结一下,遇到这一类型的题目应该怎么想。谢谢解答 |
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