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9th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    The width of each of nine classes in a frequency distribution is 2.5 and the lower class boundary of the lowest class is 10.6. What is the upper class boundary of the highest class?

    A)  35.6                           

    B)  33.1               

    C)  30.3               

    D)    28.1

    Correct Answer: B

    Solution :

    Given: Width of each of 9 classes = 2.5 Total width of 9 classes \[=9\times 2.5=22.5\] Lower class boundary of lowest class =10.6 \[\Rightarrow \]The upper class boundary of highest Class = lower class boundary of lowest Class + Total width =10.6 + 22.5 = 33.1 Hence, the required upper class boundary =33.1.


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