The following is the distribution of total household expenditure (in Rs.) of manual worker in a city:

Expenditure (in Rs.)	100-150	150-200	200-250	250-300	300-350	350-400	400-450	450-500
No. of manual worker	25	40	33	28	30	22	16	8

Draw a histogram and a frequency polygon representing the above data.

The time taken, in seconds, to solve a problem by each of 25 pupiles is as follows:

16, 20, 26, 27, 28, 30, 33, 37, 38, 40, 42, 43, 46, 46, 46, 48, 49, 50, 53, 58, 59, 60, 64, 52, 20

(a) Construct a frequency distribution for these data, using a class interval of 10 seconds.

(b) Draw a histogram to represent the frequency distribution.

Draw, in the same diagram, a histogram and a frequency polygon to represent the following data which shows the monthly cost of living index of a city in a period of 2 years:

The following table gives the distribution of IQ’s (intelligence quotients) of 60 pupils of class V in a school.

Draw a frequency polygon for the above data.

Draw a histogram for the daily earnings of 30 drug stores in the following table: