6. There are 30 students in a class, the ratio of boys to girls is 2:1. Assuming the same number of boys, how many more girls are needed in the class to invert this ratio (i.e so that it is 1:2)?
- 10
- 40
- 30
- 20
7. x:4 = 3:28 what does x equal?
- 7/4
- 3/7
- 28/12
- 4/3
