Question 702105: Calculate the number of unique 4 person groups that can be formed by selecting from eight eligible candidates.
Answer by jim_thompson5910(35256) (Show Source):
You can put this solution on YOUR website! C(n,r) = (n!)/(r!(n-r)!)
C(8,4) = (8!)/(4!*(8-4)!)
C(8,4) = (8!)/(4!*4!)
C(8,4) = (8*7*6*5*4!)/(4!*4!)
C(8,4) = (8*7*6*5)/(4!)
C(8,4) = (8*7*6*5)/(4*3*2*1)
C(8,4) = (1680)/(24)
C(8,4) = 70
So there are 70 ways to do this assuming order doesn't matter.
|
|
|