Answer:
C. 279.3
Step-by-step explanation:
To find the mean of a set of numbers you have to add all of them together and divide them by how manys numbers there are
If we add all the numbers together it equals 2514
There are 9 numbers here
2514/9=279,333333
Therefore, the answer is C
The mean is the same as the average!
To find mean ...
121+
347+
45+
21+
300+
614+
312+
333+
421
__________________
2,514
[tex]\frac{2,514}{9} = 279.33[/tex]
Final answer is D. (279.3)
