   Direction: Study the table carefully to answer the questions that follow:
Sales (in crore) of the number of units of six different IT companies over the given years

 Company Year 2012 2013 2014 2015 2016 Rolta India 110 90 140 210 175 Infosys 120 80 130 195 160 Wipro 180 70 129 185 195 TCS 190 65 118 165 185 Tech Mahindra 450 67 142 175 123 HCL 420 76 193 180 112
Important for :
1
The number of units sold by company TCS in all the given years is what per cent of the number of units sold by Wipro from 2013 to 2016 ? (approx)
» Explain it
D

TCS

=   190 + 65 + 118 + 165 + 185

=   723

Wipro

=   70 + 129 + 185 + 195

=   579

 Required % = 723 × 100 ≈ 125 % 579

Hence, option D is correct.

2
The units sold by Rolta India in 2016 is what per cent less of the total number of units sold by all the companies together in that year ? (Find in approximation)
» Explain it
C

Number of units sold by Rolta India in 2016 = 175

Total number of units sold in 2016 by all the companies

=   175 + 160 + 195 + 185 + 123 + 112

=   950

Therefore, required difference

=   950 - 175

=   775

 Reqd. % = 775 × 100 = 81.57 ≈ 82% 950

Hence, option C is correct.

3
What is the approximate average number of units sold (in crore) in the year 2013 ?
» Explain it
A

Reqd. avg

 = 90 + 80 + 70 + 65 +67 +76 6
 = 448 6

=   74.66 ≈ 75

Hence, option A is correct.

4
The ratio of units sold by Wipro In all the given years to the units sold by HCL in all the given years is?
» Explain it
C

Reqd ratio

 = 180 + 70 + 129 + 185 + 195 420 + 76 + 193 + 180 + 112

 = 759 981

 = 253 327

=   253 : 327

Hence, option C is correct.

5
FInd the differnce between the average sales of 2014 and that of 2016 for all the companies taken together?
» Explain it
B

Total sales of 2014:

=   140 + 130 + 129 + 118 + 142 + 193

=    852

Total sales of 2016:

=   175 + 160 + 195 + 185 + 123 + 112

=   950

Difference in total sales

=   950 - 852

=   98

 Reqd. average difference = 98 = 16.3 6

Hence, option B is correct.