Multiple Choice Questions on What is C n r 2C n r ndash 1 C n r ndash 2 equal to ........ for NDA Exam Preparation

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Multiple Choice Questions

What is C n r 2C n r ndash 1 C n r ndash 2 equal to ........

Mathematics (NDA) Permutation & Combination
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    What is C(n, r) + 2C(n, r – 1) + C(n, r – 2) equal to?

    C(n + 1, r)

    Incorrect Answer

    C(n – 1, r + 1)

    Incorrect Answer

    C(n, r + 1)

    Incorrect Answer

    C(n + 2, r)

    Correct Answer
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