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SSC Sample Paper Mock Test-18 SSC CGL Tear-II Paper-1

  • question_answer
    The average of three numbers is 77. The first number is twice the second and the second number is twice the third. The first number is

    A) 33

    B)  66

    C)  77

    D)  132

    Correct Answer: D

    Solution :

    Let the third number = x                    \[\therefore \]      Second number = 2x                    First number = 4x                    Now,     \[x+2x+4x=3\times 77\] \[\Rightarrow \]   \[7x=3\times 77\]\[\Rightarrow \]\[x=\frac{3\times 77}{7}=33\] \[\therefore \]      First number \[=33\times 4=132\]


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