Answer :

To find median class,


Assume Σfi = N = Sum of frequencies,


fi = frequency of class intervals


and Cf = cumulative frequency


Lets convert this data into exclusive type of data.



So, N = 57


N/2 = 57/2 = 28.5


The cumulative frequency just greater than (N/2 = ) 28.5 is 38, so the corresponding median class is 11.5 - 17.5.


Upper limit of this median class = 17.5


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