A Professor Gives the Same 100-Point Final Exam Year After

Short Answer

A professor gives the same 100-point final exam year after year and discovers that this students' scores tend to follow the triangular probability density function f(x)pictured below: What percent of the students would you expect to score above 25 points on the exam?
(All persons, places, and events in this story are fictitious.Any similarity to real persons or situations is purely coincidental.)