Directions: The following bar graph shows the number items (in thousand) produced by two companies A and B and the line graph shows the percentage sale of items of these companies over the years. 
 
Production of Company A and B




% Sale of Company A and B


Important for :
1
What is the total number of items sold by Company B in the year 2010?
» Explain it
B
Items sold by B2010 = 45000 ×  56  = 25200
100

Hence, option B is correct.

2
What is the difference between the total number items sold by Company A in the year 2012 and that in 2011?
» Explain it
D
Sale A2011 = 60000 ×  36  = 21600
100

Sale A2012 = 92000 ×  32  = 29440
100

∴   Difference = 29440 – 21600 = 7840.
3
The items sold by Company B in the year 2011 is approximately what per cent of the items sold by it in the year 2012?
» Explain it
C
Reqd% =   Items sold by Company B2011  × 100
Items sold by Company B2012

56 × 50  × 100 = 58.3% ≈ 58%
60 × 80

Hence, option C is correct.

4
What is the average number of items sold by Company A during the year 2008 to 2012?
» Explain it
E
=   35% of 50 + 35% of 72 + 47% of 48 + 36% of 60 + 32% of 92
5

=   17.5 + 25.2 + 22.56 + 21.6 + 29.44
5

=   116.3  = 23.26 thousand = 23260
5

Hencce, option E is correct.

5
In year 2011, the number of items sold by Company B is approximately what percentage more or less than the number of items sold by Company A?
» Explain it
D
The number of items sold by B2011 = 50000 ×  56  = 28000
100

The number of items sold by A2011 = 60000 ×  36  = 21600
100

∴   Reqd% =  (28000 – 21600)  × 100 =  6400  = 29.62 ≈ 30%
21600 216

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