The arithmetic mean of 5-x numbers is 62 to this group added the number 20 what is the arithmetic mean?

Knowing the value of the arithmetic mean by the condition of the problem, we calculate what the sum of the numbers of this set is equal to, for which we multiply the arithmetic mean by the number of all numbers, which by condition is 5. Thus, we get:

62 * 5 = 310.

Let’s add the number 20 to the result:

310 + 20 = 330.

Let’s find the arithmetic mean of the new set of numbers, for which we divide the found sum by the total number of numbers, which is already 6:

330: 6 = 55.

Answer: The new arithmetic mean is 55.