SSC Sample Paper SSC (Group-C) Sample Test Paper-1

  • question_answer
    If a, b, c and d satisfy the equations \[a+7b+3c+5d=0,\] \[8a+4b+6c+2d=-\,4\] \[2a+6b+4c+8d=4,\] \[5a+3b+7c+d=-\,4,\] then (a + d)/(b + c) = ?

    A)  0                   

    B)  1

    C)  -1                   

    D)  -4

    Correct Answer: C

    Solution :

     \[8a+4b+6c+2d=-\,4\] \[2a+6b+4c+8d=4\] On adding. \[10a+10b+10c+10d=0\] \[\Rightarrow \,\,a+\text{ }b+\text{ }c+\text{ }d=0\] \[\Rightarrow \,\,~a+d=-\left( b+c \right)\]


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