|Class 8 Maths Data Handling||Pie Chart|
Circle Graph or Pie Chart
A circle graph or pie chart shows the relationship between a whole and its parts.
For example, daily routine of a student is represented below.
Problem: A survey was made to find the type of music that a certain group of young people liked in a city.
Adjoining pie chart shows the findings of this survey.
From this pie chart, answer the following:
(i) If 20 people liked classical music, how many young people were surveyed?
(ii) Which type of music is liked by the maximum number of people?
(iii) If a cassette company were to make 1000 CD’s, how many of each type would they make?
(i) 10% of total is 20. or (10/100) x Total = 20
Therefore Total = 100 x 20 / 10 = 200 people
Hence, 200 people were surveyed.
(ii) Light music is liked by the maximum number of people.
(iii) CD’s of classical music = 10 x 1000 / 100 = 100
CD’s of semi-classical music = 20 x 1000 / 100 = 200
CD’s of light music = 40 x 1000 / 100 = 400
CD’s of folk music = 30 x 1000 / 100 = 300