Employees of a company have been categorized according to their religions as given below:
Religions | Hindu | Muslim | Sikh | Christian | Total |
Number of workers | 420 | 300 | 225 | 105 | 1080 |
Draw a pie-chart to represent the above information.
We know:
Central angle of a component = (component value / sum of component values
Here, total number of workers = 1050
Thus, the central angle for each component can be calculated as follows:
Religion | Number of workers | Sector angle |
Hindu | 420 | 420/1050 360 = 144 |
Muslim | 300 | 300/1050 |
Sikh | 225 | 225/1050 360 = 77.14 |
Christian | 105 | 105/1050 360 = 36 |
Note: The total number of workers is 1050, not 1080.
Now, the pie chat that represents the given data can be constructed by following the steps below:
Step 1 : Draw circle of an appropriate radius.
Step 2 : Draw a vertical radius of the circle drawn in step 1.
Step 3 : Choose the largest central angle. Here, the largest central angle is 144o. Draw a sector with the central angle 144o in such a way that one of its radii coincides with the radius drawn in step 2 and another radius is in its counter clockwise direction.
Step 4 : Construct other sectors representing other items in the clockwise direction in the descending order of magnitudes of their central angles.
Step 5 : Shade the sectors with different colours and label them as shown as in the figure below.
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