At a certain university, if 50 percent of the people who inquire about admission policies actually submit applications for admission, what percent of those who submit applications for admission enroll in classes at the university ?()
(1)Fifteen percent of those who submit applications for admission are accepted at the university.
(2)Eighty percent of those who are accepted send a deposit to the university.
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.
参考答案:E
解析:
大多数的考生会认为(1)充分,其实不然。(1)只是说明了校方愿意接受的比例,而这些人愿不愿意入学注册,还是两可之间的事,所以(1)不充分;(2)更不充分,因为(2)中并未给出被接受的人数与递交了申请的人数和最后注册入学的人数之间的关系。(1)+(2)也不充分,因为“send a deposit to the university”和“enroll in classes at the university”之间并没有必然的联系。