[求助]这道题是什么意思~

ANYOU777

        

A certain club has 20 members.  What is the ratio of the member of 5-member committees that can be formed from the members of the club to the number of 4-member committees that can be formed from the members of the club?

 

A.    16 to 1

B.     15 to 1

C.     16 to 5

D.    15 to 6

E.     5 to 4

GWD 上的一道很简单的数学题，我意思没有理解~~一共才有20个人呀 ，答案是C 那这样 16*5+5*4不是等于100了么？这道题是什么意思呀~谢谢大家啦

ANYOU777

 谢谢大家

taixiKim

C5,20/C4,20=16:5

ANYOU777

谢谢ls懂了 原来意思没有理解