We have n = 50
So, n/2 = 50/2 = 25
The cumulative Frequency just greater than n/2 is 36 then the median class is 10.75 – 11.25 such that
the lower limit (l) = 10.75
cumulative frequency of the class preceding 10.75 – 11.25 (cf) = 19
frequency of the median class 10.75 – 11.25 = 17,
class size (h) = 0.5
Using the formula,