The mean of ten positive numbers is 16. When another number is added, the mean becomes 18. Find the eleventh number
Answer Details
The mean of ten positive numbers is given to be 16. This means that the sum of these ten numbers is 10 times 16, which is 160.
When an eleventh number is added, the mean becomes 18. Let's call this number "x". Now we have a total of eleven numbers, and their sum is 11 times 18, which is 198.
We can find the eleventh number by subtracting the sum of the first ten numbers (160) from the sum of all eleven numbers (198):
x = 198 - 160 = 38
Therefore, the eleventh number is 38, which is.