Answer:
So the mean of 263,240,256 is 253 and the mean of 12,13,17 is 14
Explanation:
To get the mean of these numbers you add all three of them together then you divide them by the amount of numbers so you are going to add 263+240+256=759 then you divide by 3
![759 / 3 = 253](https://img.qammunity.org/2020/formulas/mathematics/middle-school/lkww5q1899oq21usio1qb5j3g941alw4zt.png)