From 9 names on a ballot, a committee of 4 will be elected to attend a political national convention. How many different committees are possible?
A) 126 B) 3024 C) 15,120 D) 1512
Question 2
A club elects a president, vice-president, and secretary-treasurer. How many sets of officers are possible if there are 15 members and any member can be elected to each position? No person can hold more than one office.
A) 2730 B) 1365 C) 910 D) 32,760