Explanation:
To find out how much white paint is needed to make 7.5 light green paint, we need to determine the ratio between white paint and light green paint.
The given ratio is 3 green paint : 2 white paint : 1 light green paint.
From this ratio, we can see that for every 2 white paint, we get 1 light green paint.
To find out how much white paint is needed to make 7.5 light green paint, we can set up a proportion:
2 white paint / 1 light green paint = x white paint / 7.5 light green paint
Cross multiplying, we have:
2 white paint * 7.5 light green paint = 1 light green paint * x white paint
15 white paint = 1 light green paint * x white paint
15 white paint = x white paint
Therefore, you would need 15 white paint to make 7.5 light green paint.