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Subjects
Class 11MathematicsPermutations and CombinationsCombinationsMedium
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From (9) chemistry and (6) biology books (5) books are to be selected with at least (3) chemistry books. How many ways are there?

Answer and explanation

Correct answer: (1932)

The cases are (3), (4), and (5) chemistry books. The total is (\binom{9}{3}\binom{6}{2}+\binom{9}{4}\binom{6}{1}+\binom{9}{5}=1932).

Related tags

CombinationsClass11MediumPermutations And CombinationsMathematicsClass 11 Mcq
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