The average of 10 numbers is 25. The average of first three numbers is 22 1/3 and that of next five is 15 1/5. If the eighth be less than the ninth and tenth numbers by 5 and 11 respectively, then the tenth number is:

The average weight of a class of 20 boys was calculated to be 58.4 kgs and it was later found that one weight was misread as 56 kg instead of 65 kg. What is the correct weight

Average of 13 results is 65. If the average of first six results is 61 and average of last six results is 59 Then find the seventh result

Average of five consecutive even numbers is 35. Find the greatest number in these five numbers

The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 19. What is the middle number

The average age of a class of 32 students is 16 yrs. If the teacher's age is also included, the average increases by one year. Find the age of the teacher.