Question

Six married couple are sitting in a room. Find the no of ways in which 4 people can be selected

Answer 1

The number of couples is 6, therefore, the number of people sitting in the room is 6*2 = 12.

Now we need to find the number of ways we can select 4 people. Here, we do not care about the permutations as we do not need the selections to be ordered.

Number of unordered ways to choose 4 people out of 12 is: 12C4 = 495 ways