Represent the following data with help of a pie diagram. Items Wheat Rice Tea Production(in metric tonnes) 1840 3260 900

Given data as follows: Items Wheat Rice Tea Production (in metric tonnes) 1840 3260 900 For preparing a pie chart for the given data, we use the following steps: Step 1 : Obtain the data and find the sum of various component values. Step 2 : Divide each component value by the sum obtained in Step 1 and multiply by 360 ° to obtain the sector angles (central angles) of the sectors represented by them. The central angle of a component = Value of the component Sum of the all component values × 360 ° Items Production (in metric tonnes) Central angles Wheat 1840 1840 6000 × 360 ° = 110 . 4 ° Rice 3260 3260 6000 × 360 ° = 195 . 6 ° Tea 900 900 6000 × 360 ° = 54 ° Total 6000 360 ° Step 3 : Draw a circle of appropriate size with a compass and a radius of it coinciding with 12 O ' clock position of the two hands of the clock. Step 4 : Select the component with the first central angle and construct a sector in such a way that its one radius coincide with the radius drawn in Step 3 and the other the radius is below the first radius in clockwise direction. Step 5 : Construct other sectors representing other components in the similar manner. Step 6 : Put explanatory or descriptive label inside each sector, so that they can be easily identified. If it is not possible to place the labels inside the sectors due to lack of space, then labels can be placed in continuous positions outside the circle, usually with an arrow pointing to the appropriate sector. Thus, we have the pie chart as follows:

A marketing company conducted a survey among 10000 persons in Kanpur: Students Professionals Government servants Businessman Housewife 45 % 30 % 13 % 10 % 2 % Then draw a pie chart and determine the number of persons which are professionals

Given data as follows: A marketing company conducted a survey among 10000 persons in Kanpur: Students Professionals Government servants Businessman Housewife 45 % 30 % 13 % 10 % 2 % Here, we need to draw a pie chart and determine the number of persons who are professionals Step 1 : Obtain the data and find the sum of various component values. For preparing a pie chart for the given data, we use following steps: Step 2 : Divide each component value by the sum obtained in Step 1 and multiply by 360 ° to obtain the sector angles (central angles) of the sectors represented by them. The central angle of a component = Percentage of the component 100 × 360 ° Persons (in percentage) Central angles Students 45 % 45 100 × 360 ° = 162 ° Professionals 30 % 30 100 × 360 ° = 108 ° Govt. servants 13 % 13 100 × 360 ° = 46 . 8 ° Businessman 10 % 10 100 × 360 ° = 36 ° Housewife 2 % 2 100 × 360 ° = 7 . 2 ° Total 100 % 360 ° Step 3 : Draw a circle of appropriate size with a compass and a radius of it coinciding with 12 O ' clock position of the two hands of the clock. Step 4 : Select the component with the largest central angle and construct a sector in such a way that its one radius coincide with the radius drawn in Step 3 and the other radius is below the first radius in clockwise direction. Step 5 : Construct other sectors representing other components in the similar manner. Step 6 : Put explanatory or descriptive label inside each sector, so that they can be easily identified. If it is not possible to place the labels inside the sectors due to lack of space, then labels can be placed in continuous positions outside the circle, usually with an arrow pointing to the appropriate sector. Thus, we have the pie chart as follows: Given that, the total number of persons in Kanpur = 10000 So, the percentage of persons who are professionals = 30 % Therefore, the number of persons who are professionals = 30 % of 10000 = 30 100 × 10000 = 3000 .