Total number of males studying in stream D in all the universities together in 2013, were 1190 more than that in the year 2012. In 2013, what was the total number of students (Male + Female) studying in stream D in all the universities together, if the total number of male students in stream D in 2013, constituted $$\frac{4}{7}$$ of the total number of students ?

In stream D, total no. of male students in all universities together 2012 = (600 - 250) + (400 - 180) + (500 - 260)

= 350 + 220 + 240 = 810

Total no. of male students in all universities together in 2013 = 810 + 1190 = 2000

Let total no. of students(male+female) in all universities together in stream D in 2013 = x

Now, the no. of male students is $$\frac{4}{7}$$ of the total students.

=> $$\frac{4}{7}$$ * x = 2000

=> x = 2000 * $$\frac{7}{4}$$ = 3500