Chapter 9.1, Problem 2E

Solution

To state: The numbers of ways in which four pending jobs can be prioritize from most to least important.

The resultant answer is 24 ways.

Given information:

Four pending jobs have to be prioritized from most to least important.

Explanation:

Number of jobs is: 4

Any of the jobs can be ranked at number one. Thus there are 4 ways in which a job can be placed at most important.

Now 3 jobs are remaining, the second most important job can be selected in 3 ways.

Now 2 jobs are remaining, the third most important job can be selected in 2 ways.

At last 1 job is remaining, the least important job can be selected in 1 ways.

The number of ways is:

  $4\cdot 3\cdot 2\cdot 1=24$

Therefore, there are 24 ways in which four jobs can be prioritized from most to least important.