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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-18

  • question_answer
    If \[a,a-2,3a\]are in AP, then a is

    A)  2                    

    B)  \[-\,\,2\]

    C)  3        

    D)  \[-\,\,3\]

    Correct Answer: B

    Solution :

    \[\because a,(a-2),3a\]are in AP. \[\Rightarrow \]   \[2(a-2)=a+3a\] \[\Rightarrow \]   \[2a-4=4a\] \[\Rightarrow \]   \[2a=-\,\,4\] \[\therefore \]      \[a=-2\]


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