Question

The average of eleven numbers is 54. The average of the first four numbers is 48 and that of the next four numbers is 25% more than the average of the first four. The ninth number is 8 greater than the 11th number and the tenth number is 4 greater than the 11th number. What is the average of the 9th and the 10th number?

• A. 54
• B. 56
• C. 54.4
• D. 52.6

Answer 1

Answer: (B)