SOLUTION: A bag contains 4 blue marbles and 5 red marbles. If 2 marbles are selected at random without replacement, what is the probability that both will be blue?

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Question 515140: A bag contains 4 blue marbles and 5 red marbles. If 2 marbles are selected at random without replacement, what is the probability that both will be blue?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
ways of selecting two marbles ___ 9C2

ways of selecting two blue marbles ___ 4C2

probability of two blue marbles ___ (4C2) / (9C2)