Final answer:
Ms. Floop's score after playing 15 holes in golf is 60 strokes. This has been calculated by subtracting her score relative to par (-3) from the par for the 15 holes (63).
Step-by-step explanation:
In golf, the term par refers to the average score a good player should be able to achieve on a course. If Ms. Floop's score after 15 holes is -3 relative to par, and the par for those 15 holes is 63, we can calculate her actual score. Being -3 under par means she took three fewer strokes than par. Hence, Ms. Floop's score would be:
Par for 15 holes - Ms. Floop's score relative to par = Actual score
63 - (-3) = 66
Therefore, Ms. Floop's score after 15 holes is 60 strokes.