The given bar graph shows the number of students of two schools over a period of six years.

In the bar graph, what is the ratio of the students taken for the years 2009, 2011, 2013 together from school A to the students taken for the years 2008, 2012, 2013 together from school B?

25 : 17

Number of students from A in 2009 , 2011 & 2013 = 800 + 700 + 750 = 2250

Number of students from B in 2008, 2012 & 2013 = 550 + 500 + 480 = 1530

Required ratio ,      2250  :   1530  =  25  :  17