MCQ Practice Mathematics 📖 The average of a, b, c is 6 and a - b = 4, ab = 21, what is the value of c? A 6 B 7 C 8 D 9 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 7 numbers of 40. If 3 more numbers with an average of 21 are added to these numbers,what will be the average o... NextThe average of Selim’s marks in 7 subjects is 75. His average in six subjects excluding Science is 72. How many marks did he ...
