Question

The average of twelve numbers is 39. The average of the last five numbers is 35, and that of the first four numbers is 40. The fifth number is 6 less than the sixth number and 5 more than the seventh number. The average of the sixth and seventh number is:

• A. 50
• B. 39
• C. 47.5
• D. 44.5

Answer 1

Answer: (D)