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Banking Quantitative Aptitude Sample Paper Quantitative Aptitude Sample Paper-12

  • question_answer
    If \[P\,(-1,\,\,1)\] is the mid-point of the line segment Joining \[A\,(-\,3,\,\,b)\] and \[B\,(1,\,\,b+4),\] then b is equal to

    A) 1                                 

    B) -1

    C) 2                                 

    D) 0

    Correct Answer: B

    Solution :

    Mid-point of AB is \[P\left( \frac{-\,3+1}{2},\frac{b+b+4}{2} \right)\]
    \[=P\,\left( \frac{-\,2}{2},\frac{2b+4}{2} \right)=P(-1,b\,+2)\]
    \[\because \]       Mid-point \[(-1,\,\,1)\]
    \[\therefore \]      \[b+2=1\]\[\Rightarrow \]\[b=-1\]


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