Susan is taking Western Civilization this semester on a pass/fail basis. The department teaching the course has a history of passing 84% of the...

Susan is taking Western Civilization this semester on a pass/fail basis. The department teaching the course has a history of passing 84% of the students in Western Civilization each term. Let n = 1, 2, 3, ... represent the number of times a student takes Western Civilization until the first passing grade is received. (Assume the trials are independent.) (a) Write out a formula for the probability distribution of the random variable n.