Consider the following counting problem. Allison is trying to decide which three of her eight new books to take on vacation with her. How many different ways can she choose the three books?
To solve this problem which of the following rules would you use?
A)The combinations rule only
B)The basic counting rule only
C)Both the permutations rule and the basic counting rule
D)The permutations rule only

Question

Consider the following counting problem. Allison is trying to decide which three of her eight new books to take on vacation with her. How many different ways can she choose the three books?
To solve this problem which of the following rules would you use? 
A)The combinations rule only
B)The basic counting rule only
C)Both the permutations rule and the basic counting rule
D)The permutations rule only

Quizplus · Accepted Answer

The correct rule to use is the combinations rule because the order in which Allison picks the books does not matter; what matters is which books are chosen.

Consider the Following Counting Problem