Wednesday, January 22, 2014

Common problem asked in Data Interpretation

Posted by Jasleen Behl
Today I'm going to discuss a very important question of Data interpretation. This type of question has also been asked so many times in Quantitative Aptitude section. Read the question and try to solve it yourself first.

Problem: Study the graph and try to answer the questions.


Total candidates appeared = `2` lakh

Table: State-wise percentage and ratio of Male and Female Qualified candidates


State
Per cent Qualified
Ratio of qualified candidates
Male
Female
A
50
4
3
B
60
6
2
C
55
3
2
D
45
2
1
E
65
5
4
F
55
6
5
G
50
2
6
 
1. Find total number of females qualified from states C and D together.

2. Find number of male candidates qualified from state B.

3. Which of the following pair of states have equal number of qualified male candidates?
a) C,G    b) B,F    c) C,E    d) None of these.

4. What is the total number of candidates qualified from states F and G together?

Solution: Total number of candidates = 2 lakh

Study the above chart and table first and calculate the things you require to solve the questions just as follows:


States
%age Of Candidates(from pie chart)
Number of candidates
(2lakh*percentage)
Qualified Candidates
Male: Female
Male
Female
A
14
28,000
14,000(50%)
4:3
8,000
6,000
B
19
38,000
22,800(60%)
6:2
17,100
5,700
C
5
10,000
55,00(55%)
3:2
33,00
22,00
D
21
42,000
18,900(45%)
2:1
12,600
6,300
E
13
36,000
23,400(65%)
5:4
13,000
10,400
F
20
40,000
22,000(55%)
6:5
12,000
10,000
G
8
16,000
8,000(50%)
2:6
2,000
6,000

For A = Candidate appeared = `14`% of `2,00,000` = `28,000`

Out of `28,000` `50`% qualifies the exam = `50`% of `28,000` = `14,000`

Now, ratio of male and female = `4`:`3`
Therefore, number of males qualified = `(14,000) times 4/7` =` 8,000`

Number of females qualified = `14,000` - `8,000` = `6,000`

Similarly I calculate for others. Now using this table, we can easily answer the questions

1. Total number of females qualified from states C and D together = `2200 + 6300`
⇒`8500`

2. Number of male candidates qualified from state B = `17100`

3. No two states have equal number of qualified male candidates.

4. Total number of candidates qualified from states F and G together = `22,000` + `8000`
⇒`30,000`

Note:You don't need to make the above table. I just calculate everything to make you understand. Do the required calculations only.

Check the other posts of Data interpretation also

Data Interpretation: Tables
Data Interpretation: Bar-charts


2 comments:

  1. check the result for state C.... 55% of 10,000 is 55,000?? It should be 5500.......

    ReplyDelete

I will try to respond asap