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SSC Sample Paper Mock Test-19 SSC CGL Tear-II Paper-1

  • question_answer
    The solution of the system of linear equations \[0.4x+0.3y=1.7\]and \[0.7x-0.2y=0.8\]is

    A)  \[x=3,\]\[y=2\]

    B)         \[x=2,\]\[y=-3\]

    C)  \[x=2,\]\[y=3\] 

    D)  None of these

    Correct Answer: C

    Solution :

    Here, \[\frac{4x}{10}+\frac{3y}{10}=\frac{17}{10}\]and \[\frac{7x}{10}-\frac{2y}{10}=\frac{8}{10}\] \[4x+3y=17\]                            ?(i) and       \[7x-2y=8\]                                ...(ii) On solving Eqs. (i) and (ii), we get \[x=2\] and \[y=3\]


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