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SSC Sample Paper SSC CGL - Sample Paper-3

  • question_answer
    The average of 11 numbers is 10.8. If the average of the first six be 10.4 and that of the last six is 11.5, then the middle (6th) number is

    A)  10.3                            

    B)  12.6

    C)  13.5                            

    D)  15.5

    Correct Answer: B

    Solution :

    6th number \[=(6\times 10.4+6\times 11.5-11\times 10.8)\] \[=(62.4+690.-118.8)\] \[=131.4-118.8=12.6\]


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