The following table gives the weekly expenditure of 200 families. Find the median of the weekly expenditure.

Weekly expenditure(Rs)	0-1000	1000-2000	2000-3000	3000-4000	4000-500
Number of families	28	46	54	42	30

In the class, weight of students is measured for the class records. Caculate mean weight of the students using direct method.

Weight in kg	15-25	25-35	35-45	45-55	55-65	56-75
No.of students	4	11	19	14	0	2

Calculate the mean of the following distribution using Assumed Mean Method

Class Interval	0-10	10-20	20-30	30-40	40-50
Frequency	5	7	15	28	8

Find the Arithmetic Mean of the following data using Step Deviation Method

Age	15-19	20-24	25-29	30-34	35-39	40-44
No.of persons	4	20	38	24	10	9

The following are the scored by the students in the Summative Assessment exam

Class	0-10	10-20	20-30	30-40	40-50	50-60
No.of students	2	7	15	10	11	5

The mean of five positive integers is twice their median.If four of the integers are 3, 4, 6, 9 and median is 6, then find the fifth integer.

The demand of track suit of different sizes as obtained by a survey is given below

Size	38	39	40	41	42	43	44	45
No.of persons	36	15	37	13	26	8	6	2