XDF-114

jojofgasw

Pam and Ed are in aline to purchase tickets.How many people are in the line?

1.There are 20 people behind Pam and 20 people in front of Ed.

2.There are 5 people between Pam and Ed.

一个数据充分性的题，答案是E，可我怎么觉得是C，以前做过，好象很顺利，现在却转不过弯来了。

mary1

ANS:E

因為不知道Pam與Ed誰在前面誰在後面

jojofgasw

thanks！