Direction : Study the following information carefully and answer the questions given beside.

The census officers provided the data regarding changes in population of three major towns for three years. Population of town A was 180600 in the third year and it increased 5% and 7.5% in second and third year respectively. Population of town B increased by 25% in second year and in the second year it was equal to 150% of the population of town A in first year. After taking population control measures, town B succeeds in controlling population as growth rate in third year was half of that of previous year. The area of town C is 1250 km2 and population density for second year was 250. Growth rate for town C was 11.11% and 10% for second and third year respectively.

Note: Population density is calculated as Total population ÷ Total area.
Important for :
1
Population of town B in third year exceed by how much compare to population of town A in second year?
» Explain it
C
Let the Population of Town A in first year be 100.

Thus, population of town A in third year = 105% of 107.50% of 100 = 112.875 i.e. 180600.

∴ Population of Town A in first year

 = 180600 × 100 = 160000 112.875

Thus, population of town A in second year = 105% of 160000 = 168000

Population of town B in second year = 150% of 160000 = 240000

As given, growth rate of population for town B in the second year was 25%, thus population in first year
 = 240000 × 100 = 192000 125

As growth year became half of previous years' growth rate, Population of town B in third year = 240000 + [240000 × 12.50% (half of 25%)] = 240000 + 30000 = 270000

For town C, population in second year = Population density × Area = 250 × 1250 = 312500

As growth rate for town C was 11.11% and 10% for second and third year respectively, population of C in first year
 = 312500 × 100 = 281250 111.11

Population of C in third year = 110% of 312500 = 343750.

Thus, we can present above data in tabular form as follows:

 Towns Population First Year Second Year Third Year A 160000 168000 180600 B 192000 240000 270000 C 281250 312500 343750

Required difference = Population of town B in third year – Population of town A in second year

= 270000 – 168000 = 102000

Hence, option C is correct.

2
The average population of town B for three years forms what percentage of average population of town C for three years?
» Explain it
B
Average population of town B

 = 192000 + 240000 + 270000 = 702000 = 234000 3 3

Average population of town C
 = 281250 + 312500 + 343750 = 937500 = 312500 3 3

 ∴ Reqd. % = 234000 × 100 = 74.88% 312500

Hence, option B is correct.

3
For town B, male to female ratio for the last two years was 7 : 5 and literate male and illiterate male are in the ratio of 4 : 1 for same years. Find the ratio between illiterate male in second year and literate male in third year.
» Explain it
D
Number of male in town B for Second year

 = 7 × 240000 = 140000 12

Number of male in town B for third year
 = 7 × 270000 = 157500 12

Number of illiterate male in second year
 = 1 × 140000 = 28000 5

Number of literate male in third year
 = 4 × 157500 = 126000 5

Thus, required ratio = 28000 : 126000 i.e. 2 : 9

Hence, option D is correct.

4
Refer the data provided in previous question, by what percentage the number of illiterate male in third year for town B less than female in third year for town B?
» Explain it
A
Number of illiterate male in third year for town B

 = 1 × 157500 = 31500 5

Number of female in third year for town B
 = 5 × 270000 = 112500 12

 ∴ Reqd. % = 112500 – 31500 × 100 = 72% 112500

Hence, option A is correct.

5
For the third year, if 3/8th part of population of A town are not above 20 years old, 33% of population of B town are below 20 years old and 70% of population of C town are above 20 years old, how much population of three towns are above 20 years for third year?
» Explain it
D
Population above 20 years in town A

 = 180600 – 180600 × 3 = 112875 8
Population above 20 years in town B = (100 – 33)% of 270000 = 180900

Population above 20 years in town C = 70% of 343750 = 240625

Thus, required total = 112875 + 180900 + 240625 = 534400

Hence, option D is correct.

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Aspirants preparing for IBPS PO exams for the year 2018 can practice these questions. Let us now understand, what exactly is a Caselet DI. Data interpretation normally consists of questions involving pie charts, bar graphs, line graphs, radar graphs pr table with the required information for solving the questions. In a paragraph type data interpretation question, a set of information is provided in a paragraph form. It doesn’t consist of any charts or tables. You have to read the given information carefully and draw a suitable table/chart listing out all the given data to answer the questions.

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I. While Solving caselet involves a thorough understanding of the subject matter of the passage given. Read the paragraph with utmost care and analyze what the question demands. Basically be clear on what is given and what is asked.

II. Try to underline all the important points in a caselet while reading it. You can always use symbols in place of names of persons, places etc to make your work a lot easier. Focus only on useful data and don’t do unnecessary approximations just to simplify the task.

III. With all the important information in your hand, try to represent the data in graphical or tabular form. Represent the data in a pie chart, bar graph, table etc depending upon the feasibility and the motive of the question.

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Sks Here are the some points you need to remember:

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III. Practice makes a man perfect. The more you practice these types of questions, the easier the questions will become. Practice questions will improve your speed and accuracy. While attempting these type of questions in exam, always try to choose the questions which will give you the answer with lesser effort, or you will end up spending a significant amount of time on lengthy calculations.
Caselet DI is frequently being asked these days and so we must practice this in the form of quizzes as Smartkeeda Caselt Data Interpretation Quiz for Free of Cost. So, Caselet DI is not new or not even out of way. It is just a mathematical form of English Passage. In Caselet DI, a long paragraph is given and on the basis of that. Candidates can download data interpretation quiz with solutions for banking and other competitive examination.

In the above paragraph of Caselet DI, lots of information is given. You have to read the paragraph carefully and then you have to note down all the key information as short as possible. The given information will let you draw some diagrams such as Venn diagram, tabular chart or any other diagram.

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7. Must have knowledge of Ratio and Proportion.

So, in the above information chart or Caselet Chart or Passage Chart you will see all the rules are following properly. While attempting Caselet DI you can even save your time in exam only one condition if you do practice a lot which trough you can create Image or differentiate the data and After that you can answer easily.'

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