Comprehension Passage
The bar graph shows the total number of teacher registered in different years from 2015 to 2020 in two projects UIT and BBD.
What is the ratio of the total numbers of teachers of both projects (UIT and BBD) in 2017 to the total number of teachers in 2019 of both projects (UIT and BBD)?
1
25 : 66
2
52 : 77
3
62 : 97
4
23 : 36
5
None of these