SOLUTION: if 3 books are picked at random from a shelf containing 5 novels, 3 books of poems and a dictionary, what is the probability that the dictionary is selected?

Question 252757: if 3 books are picked at random from a shelf containing 5 novels, 3 books of poems and a dictionary, what is the probability that the dictionary is selected?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if 3 books are picked at random from a shelf containing 5 novels, 3 books of poems and a dictionary, what is the probability that the dictionary is selected?
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P(dict selected) + P(dict not selected) = 1
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P(dict selected) = 1 - P(dict not selected)
= 1- 8C3/9C3
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1 - (56/84)
= 1 - 2/3
= 1/3
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Cheers,
Stan H.
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