MCQ Practice Mathematics 📖 The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mar... 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 addition of 10 digits is 462. The average of their first four digits is 52 and the average of last 5 digits is 38. What i... NextThe average of 10 numbers is -10. If the sum of 6 of them is 100, then what is the average of the other 4 numbers?
