SYLLABUS
(Click the Topic to Explore)
- Sources, acquisition and classification of Data.
- Quantitative and Qualitative Data.
- Graphical representation (Bar-chart, Histograms, Pie-chart, Table-chart and Line-chart) and mapping of Data.
- Data Interpretation.
- Data and Governance.
How to prepare for Data Interpretation Questions
DI is one of the easiest ways to score marks in any of the competitive exams especially NET exam especially because the answers are mostly based on assumptions, observations, and inferences.
Of course, there are mathematical calculations required at certain stages. The mathematical concepts required for Data Interpretation are Unitary method, Average and Percentage.
Data Interpretation or D.I. as it is popularly called, can be learnt, and understood perfectly by practice of the various types of questions. So, the plan to learn this segment would be, first, complete or revise the mathematical concepts required for the calculations. Second, pick up the basic questions from any practice book, websites etc. , remember choose the questions where you have readymade answers, because D.I. can be tricky, you will always feel your calculations and answers are correct but mostly they are not. Third, for whichever exam you are preparing, pick the past year questions with solutions and start practicing them as many times you can. You can see the improvement on your own.
At last, pick up questions without solutions but you should have answers to refer to, and try to solve them, if you are getting the answers correct now, then you have achieved your target. This is the most important step because you get to know your ability to understand and solve the unfamiliar questions as it is never said that the questions will be repeated in the competitive exam subsequently.
Here, we have tried to include some of the questions for your practice (of course with solutions).
The various concepts which are pre-requisite to DI are as follows:
- Cross-multiply means to multiply the numerator of one fraction by the denominator of the other fraction.
- Percent implies “for every hundred” and its sign is “%”.It is read as the percentage and therefore x% is read as x percent. Therefore, a fraction with denominator 100 is called a percent. For example, 30 % means 3010030100 (i.e. 30 parts from 100). This can also be written as 0.30.
Formula for Percentage:
To calculate p % of q, use the following formula:
(p/q)*100
Also remember here: p % of q = q % of p
- Average/ Mean (m)=(Sum of the terms)/(Number of terms)
PRACTISE QUESTIONS
- Look at the following diagram:
Suppose you are given the following:
- Number of students in the class= 1,000
- Number of students in the class from State X= 200
- Number of students in the class from State Y= 300
With the above information, answer the following two questions: (December,2018)
Suppose that 40% of the students in the class are female students. The number of female students from State X is 50 while the number of female students from State Y is 180.What is the number of female students from other states in the class?
-
- 150
- 100
- 130
- 170
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What is the percentage (%) of students from States other than X and Y in the class?
- 20%
- 10%
- 30%
- 50%
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2.Based on table, answer the following questions:
The number of candidates Appeared (A), Passed (P) and Selected (S) in a competitive examination in two states. (December,2018)
| Year | State X | State Y | ||||
| A | P | S | A | P | S | |
| 2010 | 990 | 195 | 48 | 1120 | 240 | 60 |
| 2011 | 650 | 150 | 44 | 960 | 180 | 52 |
| 2012 | 840 | 180 | 50 | 885 | 177 | 64 |
| 2013 | 780 | 160 | 64 | 1040 | 220 | 60 |
| 2014 | 1020 | 220 | 72 | 980 | 280 | 68 |
| 2015 | 930 | 215 | 70 | 900 | 228 | 48 |
1. In the year 2012, the % of candidates who failed in the State X was nearly:
- 80%
- 90%
- 50%
- 95%
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2. In State X, the overall pass % during the period 2010-2015 was nearly:
- 5%
- 40%
- 20%
- 50%
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3.In the year 2015, the % of candidates who passed in State X and Y taken together was nearly:
- 60%
- 50%
- 25%
- 10%
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3.Consider the following table that shows the amount of exports (in crore) from three different companies A, B and C over these years 2012-2018.Based on the date in the table. (December,2019)
Year-wise amount of Exports from companies
| Year | Amount of exports (In crore Rs) | ||
| A | B | C | |
| 2012 | 40 | 90 | 70 |
| 2013 | 70 | 50 | 100 |
| 2014 | 50 | 70 | 130 |
| 2015 | 80 | 70 | 100 |
| 2016 | 110 | 90 | 70 |
| 2017 | 60 | 110 | 90 |
| 2018 | 130 | 150 | 110 |
- In how many of the given years, were the exports from company A more than its average annual exports over the given years?
- 2
- 3
- 4
- 5
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2. In which year, the absolute difference between the exports from companies A and B was the minimum?
- 2013
- 2014
- 2015
- 2016
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3.What was the difference between the average exports of three companies in 2017 and the average exports of three companies in 2012?
- 33 crores
- 67 crores
- 25 crores
- 20 crores
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4. For which of the following pairs of years, the total exports from the three companies put together are equal?
- 2014 and 2017
- 2015 and 2017
- 2016 and 2017
- 2014 and 2015
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5. Average Annual amount of exports during the given period for company B is approximately what percent (%) of the average annual amount of exports for company C?
- 64%
- 21%
- 94%
- 33%
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4.Based on the data in the table, answer the questions that follow: (December 2019)
The table shows the percentage (%) profit earned by the company A. Income of company B and expenditure of company B during the years,2013-18 as well as formula to complete percentage (%) profit.
Year Wise Financial Details (in Rs. Lakhs)
| Year | % profit of A | Income of B (in Rs. lakhs) | Expenditure of B (in Rs. Lakhs) |
| 2013 | 40% | 48.6 | 36 |
| 2014 | 25% | 35 | 25 |
| 2015 | 60% | 62.4 | 48 |
| 2016 | 40% | 77 | 44 |
| 2017 | 10% | 80 | 50 |
| 2018 | 20% | 72 | 45 |
Where Profit (%) =((Income-Expenditure)/Expenditure )* 100
1. If the expenditure of Company A in year 2017 was Rs. 45 Lakhs, then the net profit (in Rs. Lakhs) of Company A is what percent of net profit (in Rs lakhs) of Company B on the same year?
- 15%
- 25%
- 40%
- 75%
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2.In the income of the Company A in the year 2014happened to be 32.5 Lakhs, then what was the sum of the net profit (in Rs. Lakhs) of Company A and Company B in 2014?
- 12.8 lakhs
- 13.2 lakhs
- 15 lakhs
- 5 lakhs
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3.The percent profit of Company B was maximum in the year?
- 2014
- 2015
- 2016
- 2017
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4. If the income of Company A in the year 2018 was Rs.90 Lakhs, then the net profit (in Rs. Lakhs), then the net profit (in Rs. Lakhs) of Company A and Company B in 2018 in what percent more than the net profit (in Rs. Lakhs) of Company A?
- 30%
- 60%
- 75%
- 80%
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5.What is the difference between percent (%) profit of Company A and Company B in the year 2013?
- 5%
- 7%
- 12%
- 15%
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