-7
The mean or average of the numbers -410 and 400 is -5. It is found by adding the two numbers together and dividing the sum by two.
They are all the numbers that end with 0
410
410
The count of the numbers is 410+1+400 = 811. To get the sum of all these numbers note that all the positive numbers cancel with their negative counterparts and you are left only with the numbers from -410 to -401 (inclusive). The sum of these numbers is -4055. So their mean is Sum/Count = -4055/811 = -5.
410
390, 400
380 and 410
To find the fifth number, you can use the formula for finding the average of a set of numbers. The sum of the 5 numbers is 82 * 5 = 410. The sum of the 4 known numbers is 80 * 4 = 320. Therefore, the fifth number can be found by subtracting the sum of the 4 known numbers from the sum of all 5 numbers: 410 - 320 = 90. So, the fifth number is 90.
The average of 330 and 410 is 370.
410 rounded to the nearest hundred is 400
400