thank you for all your help. The teacher has not gone through the question yet. I should have photocopy the Q, as such I can not verify the phrasing at this point. Nevertheless, the solution looks very logical. Is this methold called working backwards or internal transfer? [/quote]

I don’t know how to help my P6 boy with this homework question. He miss the class cause he had to go for tournment.


Box A has 200 red balls and 90 blue balls. Box B has 80 red balls and 100 blue balls. How many red balls and blue balls need to be moved from box A to Box B so that there are 80%of red balls in box A and 50% of blue balls in box B.