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Question

The median class for the following data is
MarksBelow 10Below 20Below 30Below 40Below 50No. of students (cf)510233140


A

10-20

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B

20-30

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C

30-40

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D

40-50

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Solution

The correct option is B

20-30


The given table can be written as:
Marks0101020203030404050No. of students (cf)510233140
Since there are a total of 40 observations, the median class is the one whose cumulative frequency is closest to and greater than 20. The class interval 20-30 is the required answer.


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