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标题: [求助]求教GWD的两道题! [打印本页]

作者: jessiema28 时间: 2007-10-16 09:25
标题: [求助]求教GWD的两道题!

第一题: Is the number of members of Club X greater than the number of members of Club Y ?

(1)
Of the members of Club X, 20 percent are also members of Club Y.

(2)
Of the members of Club Y, 30 percent are also members of Club X.

我选E,可答案是C,请问是为什么?

第二题: How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3 ?

A. 15

B. 16

C. 17

D. 18

E. 19

我数下来只有16个,可答案选C,请帮忙!

作者: keith0817 时间: 2007-10-16 09:59

第一题: Is the number of members of Club X greater than the number of members of Club Y ?

(1)
Of the members of Club X, 20 percent are also members of Club Y.

(2)
Of the members of Club Y, 30 percent are also members of Club X.

(1)+(2)代表，有一群人既是X也是Y的会员(数量固定)，但是在X里面占20%，但是在Y里面占30%，可见X的人数比较大，Y的人数比较小

第二题：How many integers from 0 to 50, inclusive, have a remainder of 1 when divided by 3 ?

A. 15

B. 16

C. 17

D. 18

E. 19

A. 15

B. 16

C. 17

D. 18

E. 19

你漏数了1，所以加上你有算到的16个 (50/3=16.....)等于17个

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