Directions: Study the following graph carefully to answer these questions:

Number of workers(in thousand) in Company A and Company B over the years

1
The number of workers in Company B in the year 2013 is what per cent of the total number of workers in Company B in all the years together?
» Explain it
C
Reqd % =  45   × 100 = 21.18%
212.5

Hence, option C is correct.

2
What is approximate average number of workers in Company A for all the years together?(in thousands)
» Explain it
A
Average

10 + 20 + 22.5 + 30 + 35 + 40
6
157.5  
6

= 26.25 ≈ 26k

Hence, option A is correct.

3
What is the percentage increase in the number of workers in Company B from 2010 to 2011?
» Explain it
D
% increament

32.5 – 30  × 100 
30

2.5 × 100
30

= 8.333 ≈ 8.3%

Hence, option D is correct.

4
For which company and in which year was the percentage rise in the number of workers from the previous year the highest?
» Explain it
B
In the year 2010,

Company A =  20 – 10  × 100 = 100%
10

Company B =  30 – 15  × 100 = 100%
15


In the year 2012

Company A =  30 – 22.5  × 100 = 33.33%
22.5

Company B =  40 – 32.5  × 100 = 23.07%
32.5

Hence, Company A and B in 2010.

Hence, option B is correct.

5
What is the ratio of total number of workers of Company A in the year 2009, 2010 and 2012 together to the total number of workers of Company B in the year 2010, 2012 and 2014 together?
» Explain it
C
Reqd ratio
= (10 + 20 + 30) : (30 + 40 + 50)
= 60 : 120
= 1 : 2. 

Hence, option C is correct.


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