Question

5

Answer 1

24 because the ratio is 5:8 and you have to multiply 5 by 3 to get 15
so you have to do the same thing to 8 and multiply it by 3 to get 24

Answer 2

5 drops of red paint for 8 drops of yellow paint therefore
5*3=15 drops of red paint
8*3= 24 drops of yellow paint