题目
Himari Fukumoto has joined a new firm and is selecting mutual funds in the firm’s pension plan. If 10 mutual funds are available, and she plans to select four, how many different sets of mutual funds can she choose?
选项
A.210
B.720
C.5,040
答案
A
解析
A is correct. The number of combinations is the number of ways to pick four mutual funds out of 10 without regard to order, which is「huixue_img/importSubject/1564548691761696768.jpeg」
A正确。组合数，指的是不考虑顺序的前提下，从10只共同基金中选择4只的方法数为：