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Question

Draw a pie chart showing the following information. The table shows the colours preferred by a group of people.
ColoursNo. of peopleBlue18Greeen9Red6Yellow3Total36

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Solution

Here, the central angle = 360 and the total number of people = 36.
ColoursNo. of peopleIn FractionCentral anglesBlue181836=1212×360=180Greeen9936=1414×360=90Red6636=1616×360=60Yellow3336=112112×360=30

Again in this question we can avoid calculations because it clearly states that,
1 person = 10, so
18 people = 180 and so on.

The required pie chart:

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