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7th Class Mental Ability Numbers Question Bank Number System

  • question_answer
    The value of is \[\frac{\mathbf{3\times [-5-9]}}{\mathbf{[(-7)-(-5)]}}\]

    A) -21                   

    B)   21

    C) \[\frac{7}{2}\]                  

    D)   \[\frac{-7}{2}\]        

    E)                                    None of these

    Correct Answer: B

    Solution :

    Explanation \[\frac{3\times \left[ -\,5-9\, \right]\,}{\left[ \left( -7 \right)-\left( -5 \right) \right]\text{ }~}\,\,=\,\,\frac{3\times [-14]}{\left[ \left( -7 \right)+\left( 5 \right) \right]}\,\,=\,\,\frac{3\times [-14]}{-2}\,\,=\,\,21\]


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