Question

A history class contains 10 male students and 7 female students. Find the number n of ways that the class can elect 2 class representatives, 1 male and 1 female

Answer 1

Total 17 students: 10 male and 7 female

no. Of ways that the class can elect 2 class representatives: (10C1) x (7C1) = 70 ways to elect the 2 class representatives.