The average score of 35 students in a class test is 46. Later, it was found that at two places 23 was read as 33, and at one place 36 was read as 30. What is the actual average score of the class?

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).