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SSC Sample Paper Mock Test-7 SSC CGL Tear-II Paper-1

  • question_answer
    Out of four numbers, the average of first the number is thrice the fourth number. If the average the four numbers is 5, fourth number is

    A)  4.5

    B)  5

    C)  2

    D)  4

    Correct Answer: C

    Solution :

    Let the fourth number be x. Sum of four numbers\[=5\times 4=20\] Sum of first three numbers \[=3x\times 3=9x\] Then,                \[9x+x=20\] \[\Rightarrow \]               \[x=2\]


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