Question

Find out the arithmetic mean, median and mode based oh the following facts :

Income (in Rs)	5-10	10-15	15-20	20-25	25-30	30-35	35-40
No. of Persons	5	15	18	22	30	10	20

Answer 1

Median No. = Size of N/2^th item = 120/2^th item = 60th item

Size of 60^th item 

The size of 50^th item is in the cumulative frequency 60. Its class interval is 20-25.

Calculation of Mode : The mode class is with highest frequency 30.