Comprehension Passage
DIRECTION : Number of students passed in SSC CGL from two coaching institutes over the years are given.
What is the respective ratio of the number of students passed in 2017, 2018 and 2015?
1
47 : 56 : 80
2
56 : 47 : 80
3
56 : 47 : 40
4
40 : 56 : 47