Answer:
C, 17.3
Explanation:
Mean is the average of the numbers. To get the mean, add all the numbers up, and divide them by how many numbers there were. Let's do that.
(16.8 + 12.3 + 19 + 17.5 + 18.2 + 17.5)/6
Simplify
101.3/6
Simplify.
~16.88
The closest estimate to that is C, 17.3