Question

A company sold music players and gaming consoles during 2011–16. The given graph shows the sales of these two items in thousands. In which year was the percentage surge in the total sale the maximum compared to the previous year?

• A. 2014
• B. 2013
• C. 2016
• D. 2015

Answer 1

The correct option is D 2015

Year	Music player	Gaming console	Total sale
2011	40000	20000	60000
2012	30000	25000	55000
2013	20000	35000	55000
2014	25000	10000	35000
2015	35000	25000	60000
2016	20000	30000	50000

Percentage surge in the sale
$=\frac{\text{Current sale - Previous sale}}{\text{Sale in previous year}}\times 100$

Percentage surge in 2012
$=\frac{55000-60000}{60000}\times 100$
$=\frac{-5000}{60000}\times 100$
$=-8.33\text{\%}$

Percentage surge in 2013
$=\frac{55000-55000}{55000}\times 100$
$=\frac{0}{60000}\times 100$
$=0\text{\%}$

Percentage surge in 2014
$=\frac{35000-55000}{55000}\times 100$
$=\frac{-20000}{60000}\times 100$
$=-33.33\text{\%}$

Percentage surge in 2015
$=\frac{60000-35000}{35000}\times 100$
$=\frac{25000}{35000}\times 100$
$=71.42\text{\%}$

Percentage surge in 2016
$=\frac{50000-60000}{60000}\times 100$
$=\frac{-10000}{60000}\times 100$
$=-16.66\text{\%}$

The maximum surge in the sales occured in 2015.