Data Interpretation


In data interpretation, there are different types of questions asked. Some of them are the traditional table-based missing data type questions, while some are radar-based or bar graph based untraditional questions. You can approach it the same way as you solve the table based questions. In any data interpretation question, it is important that you filter out the necessary data and based on that solve the required questions.

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Today our focus is on the radar web-based questions. In this question, a web-like a diagram is presented to you and on it, various data are displayed. The data given to you is in reference to the central point. Normally in this type of questions, two sets of data are given to you in a comparison sort of way. You can analyze this data to solve the questions given. The radar-based structure is also known as the spider based structure.




In the question below, the sales of TV and laptop in the subsequent years from 2004 to 2009 is given. The figures given to you is in million. Based on the figure answer the questions below.


1. How many times do the sales of a laptop less than the TV in the given years?

A. One             B. Two                C. Three            D. Four

Ans: Here the sales of televisions and laptops of six different years are given. You need to see that in which year the sale of TV was greater than the sale of the laptop. The values of different sales of units are given to you in the radar diagram above.

From the figure you can see that sales of the laptops in 2004 were lower than the sales TVs in 2004, similarly, sales of a laptop in 2005, 2008, and 2009 was lower than the sale of TVs in that year. So, there are four years where the sale of the laptop was lower than the sale of TV. Thus, the correct answer is D.

2. Find the ratio of the total number of televisions sold to the total number of laptops sold in all these years.

A. 4: 5             B. 5: 6               C. 5: 4               D. 6: 5

Ans: Here, you only have to add the total number of televisions laptop sold in all these years and compare them to find the ratio. The total number of televisions sold from 2004 to 2009 are 25 + 22.5 + 22.5 + 25 + 25 + 30 = 150. And the total number of laptops sold are: 20 + 15 + 25 .5 + 30 + 20 + 10 = 120.5. Thus the ratio of the is 150: 120.5 = 5: 4. So, the correct answer is C.

3. Which item and for which year shows the highest percentage increase in the sales in the previous year?

A. Laptop 2007                          B. TV 2007
C. Laptop 2006                         D. TV 2009

Ans: In this question, we need to find the increase in the percentage of the given items in comparison to previous years. Instead of checking all the years, we will only check percentage increase for the one given in the option. For laptop 2007, in the previous year, the sales were 30 million while in 2006 it was 25.5 so there is an increase of 4.5 million units. Therefore percentage increase will be 4.5/25.5 x 100 = 18%.

Similarly for TV 2007 it will be, 2.5/22.5 x 100 = 11.11 %. For Laptop 2006 it will be, 7.5/15 x 100 = 50 % and for TV 2009, it will be 5/25 x 100 = 20 %. So for laptop 2006, the percentage increase in sales is the highest. Thus, the correct answer is C.

4. For the data series shown in the above figure, how many years have shown the decrease in sales for both the items in the same year?

A. One          B. Two              C. Three                D. Four

Ans: We need to find the decrease in sales for both the items given and that too during the same year. This only happens one time in the year 2001 where sales of TV decreases from 20 million to 10 million and sales of laptop decreases from 25 million to 22.5 million. So, the correct answer is A.

5. Which year shows the highest percentage decrease in the total sales of the two items?

A. 2005        B. 2006           C. 2008                D. 2009

Ans: We need to first calculate the total sales of both the items in each of the years given above. The total sales will be:

Year Total sales
2004 45
2005 37.5
2006 48
2007 55
2008 45
2009 40

Now, from the table, you can see the decrease in sales occurs only thrice during 2005, 2008, and 2009. So we will calculate percentage decrease for only these three years. For 2005 decrease in sales are 7.5 million. So, the percentage decrease from the previous year will be 7.5/45 x 100 = 16.6 %. Sales decreased by 10 million from 2007 to 2008. Thus, the percentage decrease will be 10/55 x 100 = 18.18 %. For 2009 the decrease is 5 million and so the percentage decrease will be, 5/45 x 100 = 11.11 %. So, the highest percentage decrease was noted in 2008 from 2007. So, the correct answer is C.

Practice Questions


The following web graph shows the share price of the four companies W, X, Y, and Z in 2001, 2002, 2003, and 2004 respectively. Study the graph and answer the questions below:


1. Which share shows the maximum percentage change in value in 2004 over its value in 2001 of the company?

A. W           B. X            C. Y              D. Z

The correct answer is B.

2. In which year is the average share price of the four companies the lowest?

A. 2001                   B. 2002
C. 2003                  D. 2004

The correct answer is D.

3. Which share shows the highest percentage change in value over any two consecutive months?

A. W          B. X             C. Y             D. Z

The correct answer is B.

4. Shyam decided to buy 80 shares of all the companies in 2001, 100 of each company in 2002, and 50 of each in 2003. What will be Shyam’s profit/loss if sold all these shares in 2004?

A. Loss of Rs. 4950              B. Profit of Rs. 500
C. Loss of Rs. 4800             D. Profit of Rs 4060

The correct answer is A.

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One response to “Bar Graph”

  1. Vyom Jain says:

    if you are sharing questions and data please double verify them before posting, many questions and data are misleading and because of that impossible to compute.

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