Answer :

(i) The frequency distribution table for ‘less than’ type is:



(ii) The frequency distribution table for ‘more than’ type is:



Plotting points for ‘less - than ogive’ and ‘more - than ogive’ on the graph,



In this type of graph where ‘less than ogive’ and more than ogive’ are plotted in the same graph, median is found on x - axis by the intersection of these two ogives.


Here, median = 166


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