[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!

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