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.
The total number of teachers registered in projects BBD from 2017 and 2018 together is how much more than the number of teachers registered in project UIT in 2016 and 2019 together?
1
10
2
20
3
30
4
50
5
40