The table given below shows the population of two states A and B in 5 years.

What is the ratio of total population of B in year R, S and T to the total population of A in year P, Q and R?

11 : 20

Population of B in R , S & T :  Population of A in P , Q & R

   ( 200 + 100 + 250 )        :       ( 250 + 450 + 300 ) 

               550                    :             1000

                 11                    :               20