A library has an average of 240 visitors on Sundays and 150 visitors on other days. The average number of visitors per day in a month of 30 days, which begins with a Monday, is:

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).