Math apex 9.6.4

Question

She plans to roll the die until she gets a three. What's the probability of getting her first three on her fifth roll? Define the variable for finding the geometric probability distribution, P(probability of success)=?, and n (number of events until success)=

Answer 1

P(n) = p(1-p)^(n-1) = (5/6)^4*1/6 = 625/7776 = .0804