Question

Out of 9 people waiting for thier turns for an interview in how many wsys selection of 4 be made if 1 is always excluded

Answer 1

Answer:

70 ways

Step-by-step explanation:

nCr = n!/[r!(n - r)!]

It is given that,

Out of 9 people waiting for their turns for an interview  and 1 is always excluded

We have to select 4 people.

If 1 is excluded, then there are 8 people.

select 4 people from 8 people in  8c4  ways

8C4 = 8!/(4!x4!) = 70

Therefore the selcetion can be performed in 70 ways