1.

The total number of ways of selecting 3 balls from a bag containing 7 balls is

Answer»

`""^(31)C_(20)-""^(21)C_(10)`
`""^(31)C_(21)`
`""^(31)C_(20)`
`""^(31)C_(21)+""^(31)C_(20)`

Answer :A


Discussion

No Comment Found

Related InterviewSolutions