GATE | GATE-CS-2003 | Question 5

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 isGATECS2003Q4
(A) A
(B) B
(C) C
(D) D


Answer: (B)

Explanation: There are three options for every couple.

1) Nobody goes to gathering
2) Wife alone goes
2) Both go

Since there are n couples, total possible ways of gathering are 3n

Quiz of this Question



My Personal Notes arrow_drop_up


Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.