Question: 
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
80
None
50
50
60
Answer: 
50
Last Updated: 
08/11/2021 - 03:25