SOLUTION: a box contains 6 white 5 red and 4 black balls. find the probability of getting at least two red balls͵ if 4 balls are drawn from the box
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Question 959191: a box contains 6 white 5 red and 4 black balls. find the probability of getting at least two red balls͵ if 4 balls are drawn from the box Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! a box contains 6 white 5 red and 4 black balls. find the probability of getting at least two red balls͵ if 4 balls are drawn from the box
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# of ways to succeed:: 5C2*10C2 + 5C3*10C1 + 5C4 = 10*45 + 10*10 + 5 = 555 ways
# of possible groups of 4:: 15C4 = 1365
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Ans: 555/1365 = 0.4066
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Cheers,
Stan H.
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