SOLUTION: I have 15 different books, 5 were written by Lewis Carroll. I decide to take four books and select then at random what is the probability as a proper fraction that two of the books
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Question 950358: I have 15 different books, 5 were written by Lewis Carroll. I decide to take four books and select then at random what is the probability as a proper fraction that two of the books I take will be by Lewis Carroll?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
I have 15 different books, 5 were written by Lewis Carroll. I decide to take four books and select then at random what is the probability as a proper fraction that two of the books I take will be by Lewis Carroll?
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# of pairs of Carroll books:: 5C2 = 10
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# of random pairs of books:: 15C2 = 105
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P(2 Carroll books) = 10/105 = 2/21
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Cheers,
Stan H.
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