Arun
Last Activity: 7 Years ago
Dear Harsh
Case-1
No couple is chosen
2* 4C2
Case-2
When only 1 couple is chosen
4C1 *3C1 * 2C1
Case-3
When two couples are chosen
4C2
Hebce total number of ways
= 2*4C2 + (4C1*3C1*2C1) + 4C2
= 42
Regards
Arun (askIITians forum expert)