[問題]730 Test4-5

[mingwhale]

這是在730第四套做到的題目

5. 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

Ans: C

不是很確定題目在問什麼…請大俠幫忙解惑，謝謝

[spreewell]

題目指的是從20人中，組成5人小組個數跟組成四人小組個數的比例
解法：
C20取5:C20取4 = 16:5

[mingwhale]

感謝大俠相助!!(抱拳)