Chapter 8.5, Problem 89E

a.

To determine

To decide: whether scenario be counted using permutation or combinations, explain (do not calculate).

Answer to Problem 89E

Scenario be counted using permutation.

Explanation of Solution

Given information: Given scenario is “Number of ways 10 people can line up in a row

for concert tickets”.

Calculation:

Number of ways 10 people can line up in a row for concert tickets must include the order

of people in line, so scenario be counted using permutation.

Distinction between permutations and combination: in permutation the order matters, in

combination the order does not matter.

b.

To determine

To decide: whether scenario be counted using permutation or combinations, explain (do not calculate).

Answer to Problem 89E

Scenario be counted using permutation.

Explanation of Solution

Given information: Given scenario is “Number of different arrangements of three types

of flowers from an array of 20 types”.

Calculation:

Number of different arrangements of three types of flowers from an array of 20 types

must account for the order of the flowers as well, so scenario be counted using permutation.

Distinction between permutations and combination: in permutation the order matters, in

combination the order does not matter.