You have checked out b books from the library, where b is a number greater than 5. You plan to read three of the books and return them at the end of this week. In how many ways can you pick the books you will read first, second, and third?

A. b3 ways

B. (b3 - 3b2 + 2b) ways

C. (b3 - 9b2 + 27b - 27) ways

D. (5b - 3) ways

Question

You have checked out b books from the library, where b is a number greater than 5. You plan to read three of the books and return them at the end of this week. In how many ways can you pick the books you will read first, second, and third?

A. b3 ways	

B. (b3 - 3b2 + 2b) ways	

C. (b3 - 9b2 + 27b - 27) ways	

D. (5b - 3) ways

anonymous · Answer

I'm not sure how I can even guide you through this, but A.

raden · Answer

actually, it is b(b-1)(b-2)
you just expanding of that equation