Questions :
The average of twelve numbers is 42. The average of the last five numbers is 40, and that of the first four numbers is 44. the 6th number is 6 less than the fifth and 5 less than the 7th number. The average of the 5th and the 7th numbers is:
Options :
- 44
- 44.5
- 43
- 43.5
correct answer: b)
