Chapter 0, Problem 16PR

To determine

To find: Whether the permutation or combination can be used in the provided situation. Also, solve the provided situation.

Answer to Problem 16PR

Permutation is to be used here.

Explanation of Solution

Given:

It is required to place the 5 books on a shelf.

Concept used:

Permutation is used when the order of the selection does matter.

Calculation:

Here, order is a matter of fact. Thus, the permutation could be used here.

The required number of ways could be calculated as:

  $\begin{array}{c}\text{Number of arrangements = 5}\times 4\times 3\times 2\times 1\\ =120\end{array}$

Thus, the number of ways is 120.