LSuppose your school requires you to choose for books to read on summer vacation from reading list of 12 books how many different ways to choose the books are possible?

Question

I need help answering this question.

Answer 1

12 choices for the first, 11 choices for the second and so,

12 • 11 • 10 • 9 • 8 • 7 • 6 • 5 • 4 • 3 • 2 • 1=

multiply it out

Answer 2

₁₂C₄ -- the binomial coefficient of 12 pick 4 -- 12!/(4!*8!)