To make pink paint, red and white paint can be mixed in the ratio \(1:2\). If you need to make 4 litres of paint, how much red and white paint would you need? The ratio has \(1 + 2 = 3\) parts.

red and white paint can be mixed in the ratio \(1 : 2\). If you need to make 4 litres of paint. How much red paint and white paint do you need? The ratio has \(1 + 2 = 3\) parts.