Answer:
The second one is correct.
C
..................................
Yo sup??
Number of goldfish=3
Number of turtles=1
Total number of pets=4
Fraction of goldfish=3/4
Therefore the correct answer is option 4
Hope this helps

(prounounced "y bar") is the mean of the y values
Add up the y values to get
5+7+10+15+18 = 55
Then divide by 5 (because there are five y values) to get
55/5 = 11
Therefore,

The answer is choice C