MCQ Practice Mathematics 📖 The average of 20, 70 and x is 40. If the average of 20, 70, x and y is 50, then y =? A 100 B 60 C 70 D 80 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 of 10 numbers is -10. If the sum of 6 of them is 100, then what is the average of the other 4 numbers? NextThe average of 5 numbers is 40. If 2 more numbers with an average of 21 are added to these numbers, what will be the average ...
