Question

A team of 4 is to be selected from 5 boys and 4 girls .In how many ways it can be done if the selection consists of (i)exactly 2 girls.
(ii)atmost 2 girls
(iii) atleast 2 girls

Answer 1

Answer:

i)(5C2×4C2)=60

ii)(5C3×4C1) +(5C2×4C2)= 40+60=100

iii)(5C2×4C2) +(5C1×4C3) + (5C0×4C4) = 60 + 20 + 1=81

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