The following data show the monthly pocket money (in ₹) received by 50 students of a school:
Pocket money (₹): Below 20 20–40 40–60 60–80 Above 80
Number of students: 4 9 20 10 7
(a) Convert the ‘Below 20’ and ‘Above 80’ classes into class intervals that allow you to form a continuous grouped distribution.
(b) Prepare the less-than cumulative frequency table for the modified distribution.
(c) Find the median pocket money of the students.
(d) Interpret the result in one sentence.