SOLUTION: A box contains 4 red and 8 green marbles. You reach in and remove 3 marbles all at once. Find the probability that these 3 marbles: a) are all red. b) are all of the same color.

Algebra ->  Probability-and-statistics -> SOLUTION: A box contains 4 red and 8 green marbles. You reach in and remove 3 marbles all at once. Find the probability that these 3 marbles: a) are all red. b) are all of the same color.      Log On


   



Question 861808: A box contains 4 red and 8 green marbles. You reach in and remove 3 marbles all at once. Find the probability that these 3 marbles:
a) are all red.
b) are all of the same color.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A box contains 4 red and 8 green marbles. You reach in and remove 3 marbles all at once. Find the probability that these 3 marbles:
a) are all red.
Ans: 4C3/12C3 = 0.0182
b) are all of the same color.
Ans: (4C3+8C3)/12C3 = 0.2727
---------------------
Cheers,
Stan H.
-----------------------