# For the following data, draw a ‘less than’ ogive and hence find the median of the distribution.  Age  (in years ) : 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Number of  persons :  5 15 20 25 15 11 9

 Age less than 10 less than 20 less than 30 less than 40 less than 50 less than 60 less than 70 Number of  persons : 5 20 40 65 80 91 100

Plot Age on x-axis and cumulative frequency on y-axis

Marking a point on the curve whose ordinate is 50 gives an x-ordinate= 33.5

Hence, the Median of the data is 33.5 (approx)

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