Question

A paint mixture is made up of 3/20 red paint and 9/20 blue paint, and the rest is white paint. What fraction of the mixture is white paint?

The paint is sold in 5-litre containers. How many litres of red paint are needed for each container?
How many litres of blue paint are needed for each container?

Answer 1

2/5

3/4

2 1/4

Explanation:

red paint: 3/20

blue paint: 9/20

white paint: x

What fraction of the mixture is white paint?

x + 3/20 + 9/20 = 1

x + 12/20 = 20/20

x = 8/20 = 2/5

2/5 of the paint mixture is white paint.

The paint is sold in 5-litre containers. How many litres of red paint are needed for each container?

3/20 × 5 litre = 3/4 litre

Each container needs 3/4 liter of red paint.

How many litres of blue paint are needed for each container?

9/20 × 5 litres = 9/4 litres = 2 1/4 litres

Each container needs 2 1/4 liter of blue paint.