问题
单项选择题
To fill a number of vacancies, an employer must hire 3 programmers from among 6 applicants, and 2 managers from among 4 applicants.
What is the total number of ways in which she can make her selection ？（）
A.1，490
B.132
C.120
D.60
E.23
答案
参考答案：C
