Question

In how many ways can four people sit next to each other in a stadium row 12 24 256 48

Answer 1

Answer: 24

Explanation:

The permutation of n things taken r at a time is given by :-

`^nP_r=(n!)/((n-r)!)`

The number of ways four people can sit next to each other in a stadium row will be given by :-

`^4P_4=(4!)/((4-4)!)`

`=(4*3*2*1)/(0!)\ \ \ n!=n* (n-1)*(n-2),...(2)(1)`

`=24\ \ \ \ \text{ since}0!=1`

Hence, the number of ways can four people sit next to each other in a stadium row =24