Chapter 8.5, Problem 88E

a)

To determine

Whether the number of ways in which 10 people can line upin a row posing for a concert ticket can be calculated by Permutation or combination.

Answer to Problem 88E

Permutation

Explanation of Solution

To find the number of ways in which 10 people can line up in a row posing for a concert ticket, ordering is important.

So, by permutation the number of ways can be calculated.

b)

To determine

Whether the number of ways in which 3 flowers can be chosen from 20 flowers can be calculated by Permutation or combination.

Answer to Problem 88E

Combination

Explanation of Solution

To select 3 flowers from 20 flowers, ordering is not important whereas selection is important.

So, here combination should be used to evaluate the number of ways.