Question

$$\begin{array}{cc}Colours& No.ofpeople\\ Blue& 18\\ Green& 9\\ Red& 6\\ Yellow& 3\\ Total& 36\end{array}$$

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?

Answer 1

Central angle for blue = $\frac{18}{36}\times 360°=180°$

Central angle for green = $\frac{9}{36}\times 360°=90°$

Central angle for red = $\frac{6}{36}\times 360°=60°$

Central angle for yellow = $\frac{3}{36}\times 360°=30°$

Following is the required pie chart:

The percentage of the colour red is 17%.