The bar graph shows the number of students enrolled for a science course in institutes A and B during 5 years from 2014 to 2018.

What is the ratio of the total numbers of students enrolled in institute B in 2015 and 2017 to that of students enrolled in institute A in 2014 and 2016?

137 : 92

Students in B in 2015 & 2017 = 360 + 325 = 685

Students in A in 2014 & 2016 = 160 + 300 = 460

Required ratio ,  685 : 460

= 137  :  92