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  3. 7th Class
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7th Class Mathematics Sample Paper Mathematics Sample Paper-7

  • question_answer
    If \[{{\mathbf{a}}^{\mathbf{2}}}+{{\mathbf{b}}^{\mathbf{2}}}+{{\mathbf{c}}^{\mathbf{2}}}=\mathbf{96}\] and \[\mathbf{ab}+\mathbf{be}+\mathbf{ca}=\mathbf{50}\], then find the value of\[~\mathbf{a}+\mathbf{b}+\mathbf{c}.\]

    A) 50                       

    B) 14

    C) 41                       

    D) 196

    E) None of these

    Correct Answer: B

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