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[Data Sufficiency]
试题详情
题目：
In the first 2 hours after Meadow’s self-service laundry opens, m large washing machines and n small washing machines are in continual use. Including the time for filling and emptying the washing machines, each load of laundry takes 30 minutes in a large washing machine and 20 minutes in a small washing machine. What is the total number of loads of laundry done at Meadow’s self-service laundry during this 2-hour period?
- n = 3m
- 2m + 3n = 55
选项:
A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.
答案:
B
提问：
老师，这道题看到两个条件之后，一点思路都没有。根据提干，the total number of loads＝4m+6n, 我的理解是，只要能求出m和n的条件就是充分的。不知道我的思路哪里有问题？
解答：
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提问：
老师，这道题看到两个条件之后，一点思路都没有。根据提干，the total number of loads＝4m+6n, 我的理解是，只要能求出m和n的条件就是充分的。不知道我的思路哪里有问题？
解答：
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阅读1615
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