1.

Let A be the set of n ( ge 3) distinct elements.The number of triplets (a,b,c) of the elements of A in which at least co-ordinates are equal is

Answer»

`"P_(3)`
`n^(3)-""^(n)C_(3)`
`3N^(2)(n-2)`
n(3n-2)

Answer :D


Discussion

No Comment Found

Related InterviewSolutions