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10th Class Mathematics Statistics Question Bank Statistics and Probability

  • question_answer
    A school has 20 teachers, one of them retires at the age of 60 years and a new teacher replaces him, this change reduces the average age of the staff by 2 years, the age of new teacher is

    A)  28 years             

    B)  25 years

    C)  20 years           

    D)         18 years

    Correct Answer: C

    Solution :

    Not available


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