Answer:
Option C. 11
Step-by-step explanation:
If a point P lies on an ellipse, The sum of distances between the point p and the foci will be equal the major axes.
So, applying the previous rule to the problem
The red line + the blue line = major axis
6 + the blue line = 17
So, the blue line = 17 - 6 = 11
The answer is option C. 11
