Thread: Evaluate

What are the steps involved with evaluating 11!/8!?

Originally Posted by amanda1

What are the steps involved with evaluating 11!/8!?

recall that 11! = 11*10*9*....*2*1
and 8! = 8*7*6*...*2*1

so to evaluate 11!/8! notice we can write this as:

(11*10*9*8!)/8!

the 8!'s cancel, so we are left with 11*10*9 = 990