A committee of 7 has to be formed from 9 boys and 4 girls in how many ways can this be done when the committee consists of exactly 3 girls be at least 3 girls at sea at most 3 girls
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if exactly 3 girls
9C4 × 4C3 = 504
if atleast 3 girls
(9C4 × 4C3)+(9C3×4C4)=588
if almost 3 Girls
(9C7 × 4C0)+(9C6×4C1)+(9C5×4C2)+(9C4×4C3) = 36+336+756+504 = 1632
9C4 × 4C3 = 504
if atleast 3 girls
(9C4 × 4C3)+(9C3×4C4)=588
if almost 3 Girls
(9C7 × 4C0)+(9C6×4C1)+(9C5×4C2)+(9C4×4C3) = 36+336+756+504 = 1632
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