1.

A committee consisting of atleast three members is to be formed from a group of 6 boys and 6 girls, such that it always has a boy and a girl. Number of ways to form such committee is………

Answer»

`2^(12)-2^(7)-13`
`2^(11)-2^(6)-13`
`2^(11)-2^(7)-35`
`2^(12)-2^(7)-35`

SOLUTION :Set x + 8 = u, use `Am GE GM`


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