MCQ Practice Mathematics 📖 The average age of three persons is 30 years. If the ratio of three ages is 3 : 5 : 7. What is the age of the youngest person? A 16 years B 18 years C 42 years D 8 years 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 PreviousThe average age of 12 students is 20 years. If the age of one more student is included the average decreases by 1, what is th... NextThe present ages of A and B are in the ratio 6 : 4. Five years ago their ages were in the ratio 5 : 3. Find their present ages.
