Question

There are four post boxes in a locality. Then number of ways in which a person can post five letters is

• A. $5!$
• B. $4!$
• C. $5^4$
• D. $4^5$

Answer 1

The correct option is D $4^5$

Each letter can be posted in any of four post boxes in $4$ ways
$\therefore$Total number of ways of posting is$4\times 4\times 4\times 4\times 4\times =4^5$