Multiple Choice Questions on The matrix A has x rows and x 5 columns The matrix B has y rows and 11 ndash y columns Both AB and B........... for NDA Exam Preparation

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Multiple Choice Questions

The matrix A has x rows and x 5 columns The matrix B has y rows and 11 ndash y columns Both AB and B...........

Mathematics (NDA) Matrices and Determinants
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    The matrix A has x rows and x + 5 columns. The matrix B has y rows and 11 – y columns. Both AB and BA exist. What are the values of x and y respectively?

    8 and 3

    Correct Answer

    3 and 4

    Incorrect Answer

    3 and 8

    Incorrect Answer

    8 and 8

    Incorrect Answer
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    Explanation:

    For AB and BA to be exist
    x + 5 = y and 11 – y = x
    Solving these, x = 8 and y = 3

    By: Munesh Kumari
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