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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-4

  • question_answer
    The average of 20numbers is 12. The average of the first; 12 numbers is 15, and that of the next 7 numbers Is 1o, The last number is

    A)  40                               

    B)  38  

    C)  48                   

    D)         50

    Correct Answer: B

    Solution :

     Last number = Sum of 20 numbers - sum of first 12 numbers - sum of next 7 numbers \[=20\times 12-11\times 12-7\times 10=\] \[240-132-70=38\]


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