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Question

ColoursNo. of peopleBlue18Green9Red6Yellow3Total36

Draw a pie chart showing the given information. The table shows the colours preferred by a group of people. Calculate the respective proportion of each colour and use that proportion to find the central angle. What is the percentage of the colour red?


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Solution

Central angle for blue = 1836×360°=180°

Central angle for green = 936×360°=90°

Central angle for red = 636×360°=60°

Central angle for yellow = 336×360°=30°

Following is the required pie chart:

The percentage of the colour red is 17%.


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