JEE Main & Advanced Sample Paper JEE Main Sample Paper-9

  • question_answer
    Minimum number of zeroes in upper triangular, matrix of order 15 is

    A)  105                       

    B)  120     

    C)  110                       

    D)  112

    Correct Answer: A

    Solution :

    In upper triangular all elements below leading diagonal are zero. \[\therefore \]minimum number of zeroes = 1 + 2 + 3 + ...14\[=\frac{14\times 15}{2}=105\]


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