SOLUTION: A carpenter has a box of 70 nails..30 are black,25 red and 15 are blue..suppose 3 nails are drawn..find probability that the drawn nails are not black..

Question 534136: A carpenter has a box of 70 nails..30 are black,25 red and 15 are blue..suppose 3 nails are drawn..find probability that the drawn nails are not black..
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A carpenter has a box of 70 nails..30 are black,25 red and 15 are blue..suppose 3 nails are drawn..find probability that the drawn nails are not black..
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# of ways to get 3 not-black: 40C3
# of random sets of 3 nails: 70C3
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P(3 not-black) = 40C3/70C3 = 0.1805
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Cheers,
Stan H.
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