SOLUTION: A jar contains nine black buttons and two brown buttons. If nine buttons are picked at random, what is the probability that all of them are black?

Algebra ->  Permutations -> SOLUTION: A jar contains nine black buttons and two brown buttons. If nine buttons are picked at random, what is the probability that all of them are black?       Log On


   

Question 1106139: A jar contains nine black buttons and two brown buttons. If nine buttons are picked at random, what is the probability that all of them are black?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
(9/11) for first (8/10)*7/9*6/8*5/7*4/6*3/5*2/4*1/3
This is 9!2!/(11!)=0.0182