A box contains 200 marbles, 25% of them are red and the rest are black. From the box, you gave your brother a certain number of marbles of which 60% are black. You then found that among the remaining marbles, only 20% are red. How many marbles did you giv

প্রশ্নঃ A box contains 200 marbles, 25% of them are red and the rest are black. From the box, you gave your brother a certain number of marbles of which 60% are black. You then found that among the remaining marbles, only 20% are red. How many marbles did you giv