Consider the Following Counting Problem

question 18

Multiple Choice

Consider the following counting problem. How many different sequences of 3 letters can be formed using the letters a, b, c, d, e if repetition is allowed?
To solve this problem which of the following rules would you use?

• A)The basic counting rule only
• B)The combinations rule only
• C)Both the permutations rule and the basic counting rule
• D)The permutations rule only