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[Problem Solving]

试题详情

题目:

On a certain transatlantic crossing, 20 percent of a ship's passengers held round-trip tickets and also took their cars abroad the ship.  If 60 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship's passengers held round-trip tickets?

选项:

A、
B、40%
C、50%
D、60%
E、

答案:

C

提问:

不会解题。

解答:

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阅读4948
解答: sysadmin

提问:

设总人数100,根据题目,20/0.4=50 为什么60/0.8算不出来?

解答:

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阅读4937
解答: sysadmin老师

提问:

不会解题。

解答:

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阅读4949
解答: sysadmin老师

提问:

知道了A∩B和A∩非B,怎么求A? 两个减得40不对啊。 以前只教过A+B-A∩B是全集 这道题怎么做?

解答:

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阅读5084
解答: sysadmin老师

提问:

题目没看懂!!!

解答:

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阅读4935
解答: sysadmin老师

提问:

题读不懂

解答:

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阅读4937
解答: sysadmin老师

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