Chapter 12.7, Problem 21STP

To determine

To find the number of ways the letters P, Q, R and S can be arranged.

Answer to Problem 21STP

The letters P, Q, R and S can be arranged $24$ ways.

Explanation of Solution

Given information:

The given statement is:

“How many different ways can the letters P, Q, R and S be arranged.

The letters P, Q, R and S can be arranged in the following number of ways:

  $\begin{array}{l}4!=4\times 3\times 2\times 1\\ 4!=24\end{array}$

The letters P, Q, R and S can be arranged $24$ ways.