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1. 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 give
- A. 50
- B. 50
- C. 50
- D. 50
Answer: Option A
Explanation:
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