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  3. 9th Class
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9th Class Mathematics Statistics Question Bank Statistics and Probability

  • question_answer
    The mean of a set of 15 observations is 18 and another set of 21 observation is 19, The mean of the combined set is _________

    A) 16.38                                                   

    B) 17.48

    C) 18.58      

    D) 19.68

    E) None of these

    Correct Answer: C

    Solution :

    Not Available                                                  


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