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MHT CET Mathematics question

MathematicsPermutations and CombinationsMHT CET

A boy has library tickets and books of his interest in library. Out of these books, he does not want to borrow Chemistry part II, unless Chemistry part I is also borrowed. The number of ways he can borrow books equals.

Answer: (C)

Solution

Case 1: Chemistry part I is borrowed (part II may or may not be): choose the other books from the remaining : . Case 2:

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Question ID VK-027839