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Following is the data showing weights of 40 students in a class . Find its median .
image

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To find the median , we prepare less than cumulative frequency table as given below :
image
Here , n = 40 which is even .
`therefore` Median = Value of `(40)/(2)` , or the 20th observation .
From the column of cumulative frequency , the value of 20th observation is 49 .
`therefore` Median = 49 kg .

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