A batsman has a certain average of runs for 16 innings. In the 17th inning he makes a score of 85 runs, thus increasing his average by 3 runs. What is the average of the batsman after the 17th inning?

The average of 100 numbers is 40. If one of the numbers, 30, is replaced by 70 while keeping the other numbers same, what is the new average?

The arithmetic mean of 22.5, 56, 42.5, 2x + 1, x - 2, 3x, and 36 is 30. Find the value of x (where x > 0).