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[Data Sufficiency]

试题详情

题目:

Theater M has 25 rows with 27 seats in each row. How many of the seats were occupied during a certain show?
(1)   During the show, there was an average (arithmetic mean) of 10 unoccupied seats per row for the front 20 rows.
(2)   During the show, there was an average (arithmetic mean) of 20 unoccupied seats per row for the back 15 rows.

选项:

答案:

E

提问:

我选的D 总共多少个座位知道,第一个条件可以知道有多少个座位没人坐,那剩下的不就是有人坐的座位吗?我的思路哪里有问题?第二个条件我觉得是一样的。

解答:

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阅读2174
解答: sysadmin

提问:

这道题麻烦讲一下谢谢

解答:

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阅读2132
解答: 姜山老师

提问:

我选的D 总共多少个座位知道,第一个条件可以知道有多少个座位没人坐,那剩下的不就是有人坐的座位吗?我的思路哪里有问题?第二个条件我觉得是一样的。

解答:

点赞0
阅读2175
解答: sysadmin老师

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