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9th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    The mean of 11 numbers is 10. What should be added as 12th number to make the mean 14?

    A)  10                               

    B)  72                   

    C)         58                   

    D)         90

    Correct Answer: C

    Solution :

    Mean of 11 observations =10 Sum of 11 observations Letbe added as 12th number. Then mean of 12 observations = 14 Sum of 11 observations  


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