Susan makes purple paint by mixing red and blue paint in the ratio 2:3
She has 12ml of red and 15ml of blue
What is the maximum amount of purple she can make?
25ml — you add up the two numbers in the ratio, and that makes 5 (2+3), you then need to make sure that your answer is a multiple of 5 while being in the ratio 2:3. You then add up the 2 colours of paint
