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9th Class Mathematics Statistics Question Bank Statistics and Probability

  • question_answer
    The mean of 18 items was found to be 25. On rechecking it was found that two items were wrongly taken as 23 and 20 instead of 26 and 30 respectively. The correct mean is _____

    A) 25.60                                                               

    B) 25.32        

    C) 25.72      

    D) 25.52

    E) None of these

    Correct Answer: C

    Solution :

    Not Available                                                  


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