Provide an Appropriate Response $A , B , C$ , and D If Repetitions Are Not Allowed
B: the to Determine

Multiple Choice

Provide an appropriate response.
-The combination formula can be used to determine which of the following? A: The number of sequences of 3 letters using the letters $A , B , C$ , and D if repetitions are not allowed
B: The number of ways of choosing a president and a treasurer from 10 people C: The number of ways to choose 3 friends from 10 to invite to dinner

A) A only
B) C only
C) B and C
D) B only
E) A and B