Friday, 28 April 2017

Data Interpretation III- How to solve Pie chart Questions in Less Time for IBPS PO Exam

In this post we will solve Pie Chart Questions by using Smart Methods that take less time in IBPS PO Exam 
Pie Chart Questions
In IBPS PO ExamData Interpretation Questions manage to make their gateway. It is necessary to understand the concept as Data Interpretation questions carry heavy weightage, which varies from 10-45 marks. This concept from the quantitative aptitude section is based on calculation and selecting the right numbers from the given Data. One such set of Data Interpretation questions are asked on Pie Charts. Pie Chart questions are easy to solve if one selects the right formula and substitutes the correct values.

This is the third part of different types Data Interpretation Questions. The first part - Data Interpretation 1: Data Interpretation Tricks to solve Data Interpretation Question, discusses the basic concept of Data Interpretation and little tricks to solve Data Interpretation Questions. The second part - Data Interpretation 2: When Questions are Asked on Tabular form, discusses the first method of representation of data- Tables. In this post we will discuss the second method of Data Interpretation "Pie Chart" and will solve few Pie Chart Questions.

What is a Pie Chart?

A pie chart is a circle which is drawn around an angle of 360 degrees. It is divided into different sectors where each sector represents a particular element, from the given data. A pie chart is useful when percentage proportion of various elements are to be shown. A pie chart is similar to a pizza or a pie, which is cut into four quarters where each quarter represents 25% of the pizza or the pie, likewise, a complete circle is cut into different proportions based on the percentage. A pie chart is visually attractive and helps in making an easy comparison.

In the examination, pie chart questions may contain one, two or three diagrams and have pie chart questions on it. In pie chart questions, we need to take all the pie charts into consideration while solving a problem.

Example of Pie Chart Questions
Problem 1:
Pie Chart Questions
Pie Chart Questions
Pie Chart Questions

Before going ahead let's look at all the possible questions that can be asked, by taking the accounts department as an example.

  • Total number of people in accounts department = 20% of 3600 = 720
  • Total number of people who got promoted in accounts department = 8% of 1200 = 96
  • Total number of males in account department = 5% of 2040 = 102
  • Total number of females in account department = No.of people in accounts department - No.of males in accounts department = 720 -102 = 618
Question 1: If half of the employees who got promoted from IT department are males, what is the approximate percent of males who got promoted from the IT department?
1)61       2)29       3)54       4) 42       5) 38

Solution:
Step 1:
Half of the employees who got promoted from IT departments are males,
Number of people who got promoted from IT department = 26% of 1200 = 312
Number of males who got promoted from IT department = (1/2 ) of 312 = 156

Step 2:
We need to find the percentage of the number of males who got promoted from IT department.
x is what percent of y= x/y x 100 [ Percentage Formula]
x= Number of males who got promoted from IT department = 156
y = Total number of males in IT department = 20% of 2040 = 408
No. of males in IT department/ No. of males x 100

Step 3:
By substituting the values in the formula
156/408 x 100
= 38%

Therefore, the percentage of the number of males who got promoted from the IT department is 38%.
Pie Chart Questions
Question 2: What is the total number of females working in the production and marketing department together?

Solution:
Step 1:
We need to find No.of females working in Production and Marketing Department.

No. of female in the Production and Marketing Department = No. of employees in Production and Marketing Dept. - No. of males in Production and Marketing Dept.

Step 2:
We can club departments together instead of finding the number of people working for individual departments.
No.of employee (Production + Marketing) = 3600 (35% + 18%)  
                                                                = 3600 x 53% = 1908

No.of males (Production + Marketing) = 2040(50% + 15%)
                                                     = 65% of 2040 = 1326

No. of females in Production and marketing department = 1908 - 1326
                                                                                       = 582

Therefore, the total number of females in the Production and Marketing Departments are 582.

Question 3: What is the angle made at the centre by the sector showing the number of males in the marketing department?

Solution:
Step 1:
The formula for finding the angle that is made at the centre is,
Percentage of number of males x 360o(As it makes a complete angle)
15% of 360o = 54o

Therefore, the angle that will be made by the total number of males working in the marketing department is 54o.

Question 4:  What is the percentage of the total number of people who got promoted from all the departments?
1) 56      2)21     3) 45      4) 33     5) 51

Solution:
Step 1:
As we need to find the percentage change
x is what percent of y = x/y x 100 [Formula]
x -Total number of people who got promoted
     in all the departments = 1200
y- Total number of employees in all the departments = 3600

Step 2:
Substituting the values in the formula,
1200 /3600 x 100 = 33.33%

Question 5: What is the ratio of the number of employees who got promoted in HR department to the number of male employees in IT department.

Solution:
Step 1:
We need to find the ratio of,
No. of people promoted in HR department: Number of Males in IT department

Step 2:
By substituting the values in the formulas
11% of 1200: 20% of 2040

Step 3:
By taking percent as common
11 x 1200 : 20 x 2040
11:34

Therefore, The ratio of people who got promoted in HR department and the number of males in IT department is 11:34.

Do write in the comment section how this blog helped you to solve Pie Chart Questions.

Stay tuned for our next blog in this series.
Pie Chart Questions






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