Question

In how many ways can a team of 5 persons can be formed out of a total of 10 persons such that two particular persons should be included in each team?

Answer 1

I think 11 person is your answer
.

Answer 2

Answer:

56 is answer

Step-by-step explanation:

Two particular persons should not be included in each team.

i.e., we have to select 5 persons from 10-2 = 8 persons.

Hence, required number of ways

= 8C5

= 8C3[∵ nCr = nC(n-r)]

=

8

×

7

×

6

3

×

2

×

1

=

8

×

7

=

56