SOLUTION: an urn contains 4 black marbles, 3 red marbles, and 5 green marbles. Three marbles are selected without replacement. Find the probability that at least one red marble is selected

Question 844896: an urn contains 4 black marbles, 3 red marbles, and 5 green marbles. Three marbles are selected without replacement. Find the probability that at least one red marble is selected
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Look at all of the combinations that don't have R in them and calculate the probabilities

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