MCQ Practice Mathematics 📖 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 ... Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up Previous৯০ কোন সংখ্যার ৭৫%? Nextআমের পূর্বমূল্য : বর্তমান মূল্য = 4 : 5 হলে শতকরা মূল্য বৃদ্ধি কত?