Asked by PRIYA
A committee is to be formed consisting of 7 members from 8 parents, 5 teachers and the principal. How many ways can the committee formed if the committee consists of not more than 4 parents?
Answers
Answered by
oobleck
0 parents: 0 ways (not enough people)
1 parent: 8 * 5C5 * 1C1
2 parents: 8C2 * 5C4 * 1C1 + 8C2 * 5C5
and so on
add them all up.
1 parent: 8 * 5C5 * 1C1
2 parents: 8C2 * 5C4 * 1C1 + 8C2 * 5C5
and so on
add them all up.