Study the following graph carefully & answer the questions given below:
Three different products (in thousands) produced by a company in five different years
What was the respective ratio between the number of CDs produced by the company in the year 2009 and the number of Keyboards produced by the company in the year 2005?
9 : 10
The ratio between the number of CDs produced by the company in the year 2009 and the number of Keyboards produced by the company in the year 2005
= (22.5) : (25) = 45 : 50 = 9 : 10