SOLUTION: I have tried to figure out this problem, could smeone please help me with it? 90!/(90-10)!*10! This is a combination right? But how do you work it?

Algebra ->  Permutations -> SOLUTION: I have tried to figure out this problem, could smeone please help me with it? 90!/(90-10)!*10! This is a combination right? But how do you work it?      Log On


   



Question 734904: I have tried to figure out this problem, could smeone please help me with it?
90!/(90-10)!*10!
This is a combination right?
But how do you work it?

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
This problem is dealing with factorials
for example 3! = 3 * 2 * 1
with this in mind the problem states
90!/(90-10)!*10! so we have
90!/80!*10!
divide top and bottom of fraction by 80! and we get
90*89*88*87*86*85*84*83*82*81 / 10*9*8*7*6*5*4*3*2*1