Ajay has 6 friends. In how many ways can he invite at least one of them for a birthday party?
Answers
Answered by
1
Step-by-step explanation:
He has 6 friends and he wants to invite one or more. That is the same as saying he wants to invite at least 1 of his friends.
So, the number of ways he could do this is:
Invite only one friend
Invite any two friends
Invite any three friends
Invite any four friends
Invite any five friends
Invite all six friends
This can be thought of in terms of combinations. Inviting r friends out of n is same as choosing r friends out of n . So, we can write the possibilities as:
6C1+6C2+6C3+6C4+6C5+6C6
=6+15+20+15+6+1
=63
Therefore, there are 63 ways in which he can invite 1 or more friends out of his 6 friends.
Answered by
1
Answer:
63
Step-by-step explanation:
he can Invite friends in this way
6c1+6c2+6c3+6c4+6c5+6c6
6+15+20+15+6+1=63
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