We have n = 250
So, 2/2 = 250/2 = 125
The cumulative Frequency just greater than n/2 is 127 then the median class is 50-60 such that the lower limit (l) = 50
cumulative frequency of the class preceding 50 – 60 (cf) = 96
frequency of the median class 50 – 60 = 31,
class size (h) = 10
Using the formula,