1.

The straight lines I_(1),I_(2),I_(3) are paralled and lie in the same plane. A total number of m point are taken on I_(1),n points on I_(2), k points on I_(3). The maximum number of triangles formed with vertices at these points are

Answer»

`""^(m)C_3xx ""^(n)C_3 XX ""^(k)C_3`
`""^((m+n+k))C_3-(""^(m)C_3 +""^(n)C_3"""^(k)C_3)`
`""^((m+n+k))C_3`
NONE of these

Answer :B


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