hi all!!

another one!!

"n" couples are invited to a party with the condition that every husband should be accompanied by his wife. However, a wife need not be accompanied by her husband. The number of different gatherings possible at the party is ???

the options are: 3n, (2n)!, 2n ..............sorry there shud be 4 options available but i can see only 3 of them.............but hope u all will get the idea!!

thnx!!