Solution:
It is given that the median of the following data is and the total frequency is .It is given that the median is . Clearly, it lies in the class The general formula for median is given as,
Median Where,
l = lower limit of median class
C.F. = C.F. of previous class
f = frequency of median class
h = width of median class = upper limit - lower limit
Substituting all the above values in given formula of median, we obtain,
Putting in , we get Therefore, and Hence, option (4) is correct.