9th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    The mean of some observations is 50. If their sum is 600, what is the number of observations?

    A)  8                                

    B)  12                  

    C)  16                  

    D)    10                  

    Correct Answer: B

    Solution :

    Number of observations \[\text{=}\frac{\text{Sum}\,\text{of}\,\text{observations}}{\text{Mean}}=\frac{600}{50}=12\]


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