The shirt sizes worn by a group of 200 persons, who bought the shirt from a store, are as follows:

Shirt size	37	38	39	40	41	42	43	44
Number of persons	15	25	39	41	36	14	15	12

Find the model shirt size worn by the group.

The following table gives production yield per hectare of wheat of 100 farms of a village:

Production yield	50-55	55-60	60-65	65-70	70-75	75-80 in kg per hecctare
Number of farms	2	8	12	24	38	16

Draw ‘less than’ ogive and ‘more than’ ogive.

Write the median class for the following frequency distribution:

Class-interval	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80
Frequency	5	8	7	12	28	20	10	10

Write the median class of the following distribution:

Classes	0-10	10-20	20-30	30-40	40-50	50-60	60-70
Frequency	4	4	8	10	12	8	4

Find the mode of the following distribution:

Class-interval	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80
Frequency	5	8	7	12	28	20	10	10

Find the mode of the following distribution.

Class-interval	25-30	30-35	35-40	40-45	45-50	50-60
Frequency	25	34	50	42	38	14

Draw an ogive to represent the following frequency distribution:

Class-interval	0-4	5-9	10-14	15-19	20-24
No. of students	2	6	10	5	3

Calculate the mean for the following distribution:

x	5	6	7	8	9
f	4	8	14	11	3

The monthly profits (in Rs.) of 100 shops are distributed as follows:

Profits per shop	0-50	50-100	100-150	150-200	200-250	250-300
No. of shops	12	18	27	20	17	6

Draw the frequency polygor it.

Find the mode of the following distribution.

Class-interval	10-15	15-20	02-25	25-30	30-35	35-40
Frequency	30	45	75	35	25	15