SOLUTION: 3 balls are selected at random from 7 red and 3 black. How many ways are there to make a selection of at least one red ball?
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Question 925693: 3 balls are selected at random from 7 red and 3 black. How many ways are there to make a selection of at least one red ball?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
10 Balls: 7R, 3B
3 chosen
P(at least one red) = 1 - (no red) = 1 - (3/10)^3 = .973
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