Sarah is going to make some fruit punch. She needs to mix apple juice, orange juice and pineapple juice in the ratio $3:4:2$

Sarah wants to make 1800 ml of fruit punch.

Sarah has: 500 ml of apple juice 900 ml of orange juice 450 ml of pineapple juice

Does Sarah have enough apple juice, orange juice and pineapple juice to make the fruit punch? You must show all your working.