In how many ways five persons can stand in a row ?

Answer

120

Explanation

For five persons to stand in a row, we create five places for them in a row.

`1^(st)` place can be occupied by any one of the five persons. So, there are five options for first place.
`2^(nd)` place can be occupied by any one of the remaining four persons. So, there are four options for second place.
Similarly, for `3^(rd),4^(th) " and" 5^(th)` places there are 3,2 and 1 options respectively.