Thread: permutation and combination question...please help!

5 prefects are to be chosen from 6 boys and 4 girls.in how many ways can this be done if

a)all the prefects are boys

b)there are at least two girls

Originally Posted by cantcount

5 prefects are to be chosen from 6 boys and 4 girls.in how many ways can this be done if

a)all the prefects are boys

How many ways can 5 boys be chosen from 6?.

b)there are at least two girls

At least two means 2 up to 4 girls are to be chosen. Add the 3 cases up.

2 girls and 3 boys, 3 girls and 2 boys, 4 girls and 1 boy.