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9th Class Mathematics Statistics Question Bank Statistics and Probability

  • question_answer
    If the mean of 29 observation is 35. Out of these observations, If the mean of first 15 observation is 30 and that of last 15 observation 38, the 15th observation is:

    A) 15                                                        

    B) 18           

    C) 8                                                                                 

    D) 5

    E) None of these

    Correct Answer: D

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