Question

20
3. There were 1200 cards in a box. of them were red colour, 40% of
them were green colour and rest were blue and yellow colour cards.
If there were 240 blue colour cards, how many cards were of yellow
colour?​

Answer 1

I can solve the question .....but you have not mentioned the no. of red coloured cards....pls re check the question it's incomplete there.