SOLUTION: Please help!!
Question:
A box contains 4 red and 7 green marbles. You reach in and remove 2 marbles all at once. What is the probability of picking one red marble, and one gree
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Question 1111761: Please help!!
Question:
A box contains 4 red and 7 green marbles. You reach in and remove 2 marbles all at once. What is the probability of picking one red marble, and one green marble?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
probability (P) of picking one red marble, and one green marble is
:
there are 11C2 ways to pick two marbles out of 11 without replacement, where 11C2 = 11!/(2! * (11-2)!) = 55 ways
:
then we have
:
(4C1 * 7C1) / 55 = 28/55 = 0.5091
:
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