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

Step-by-step explanation:

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

$^nP_r=\dfrac{n!}{(n-r)!}$

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

$^4P_4=\dfrac{4!}{(4-4)!}$

$=\dfrac{4\times3\times2\times1}{0!}\ \ \ n!=n\times (n-1)\times(n-2),...(2)(1)$

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

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