Direction: Look at the following diagram and answer the questions given below. Study the table carefully and answer the questions given below. Total sales of different mobiles for three different years (in million)

20102011 
20112012 
20122013 
Samsung 
18 
36 
75 
Nokia 
108 
81 
105 
Soni 
24 
32 
60 
Blackberry 
28 
42 
70 
Micromax 
34 
17 
85 
Formula:
Percentage formula = [(Old number – New number)/(Old number)] × 100
Calculation:
The number of mobiles sold by Samsung in 20102011 is 18
The number of mobiles sold by Samsung in 20112012 is 36
Difference = 36 – 18 = 18
According to the formula,
The percentage increase by Samsung in 20112012:
⇒ (18/18) × 100
⇒ 100%
The number of mobiles sold by Nokia in 20102011 is 108
The number of mobiles sold by Nokia in 20112012 is 81
Difference = 108 – 81= 27
According to the formula,
The percentage decrease by Nokia in 20112012:
⇒ (27/108) × 100
⇒ 25%
The number of mobiles sold by Soni in 20102011 is 24
The number of mobiles sold by Soni in 20112012 is 32
Difference = 32 – 24 = 8
According to the formula,
The percentage increase by Soni in 20112012:
⇒ (8/24) × 100
⇒ 33.33%
The number of mobiles sold by Blackberry in 20102011 is 28
The number of mobiles sold by Blackberry in 20112012 is 42
Difference = 42 – 28 = 14
According to the formula,
The percentage increase by Blackberry in 20112012:
⇒ (14/28) × 100
⇒ 50%
The number of mobiles sold by Micromax in 20102011 is 34
The number of mobiles sold by Micromax in 20112012 is 17
Difference = 34 – 17 = 17
According to the formula,
The percentage decrease by Micromax in 20112012:
⇒ (17/34) × 100
⇒ 50%
∴ The Total number of companies where the number of mobiles sold in the year 20112012 has increased or decreased by at least 50% as compared to the year 201011 is 3.