[離散][習題本] ch3 排列組合與排容原理之問題

３－２　Aclub with 20 women and 17 men needs to choose thre*s to be president, vice president, and treasurer.
(b) In how many ways is this possible if women will be chosen as president and vice president and a man as treasurer
答案給的是: 37*36*17
但是我的應該是 20*19* 17才對吧 應該是從女生堆中挑兩個出來再從17個男生挑一個出來
不知道答案有沒有錯
還是說我的想法有錯呢?
麻煩解惑囉~