Write any five points from the given pie chart information regarding pollutants entering in the oceans.

In a study of dental problem, the following data were obtained.

Ages	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80
No. of patients	5	13	25	14	30	35	43	50

Represent the above data by a frequency polygon

Draw a pie chart for the given table.

Continent	Asia	Africa	North America	South America	Europe	Australia	Antarctica
Area	30 %	20 %	16 %	12 %	7 %	6 %	9 %

Form a continuous frequency distribution table and draw histogram from the following data.

Age (in years)	No. of persons
Under 5	1
Under 10	12
Under 20	26
Under 25	27
Under 30	35
Under 35	38
Under 40	45
Under 45	48
Under 50	53

Draw a histogram for the following data.

Mid Value (x)	15	25	35	45	55	65	75
Frequency (f)	12	24	30	18	26	10	8