I apologize if this is too simple a question. One of the exercises in my probability textbook says
"A dice is rolled until the first time T that a 6 appears. Find P(T > 3)"
The answer given is (5/6)^3. I am fairly certain this question is a negative binomial distribution question, because it is counting the number of trials until the first success, but I am unsure how the author arrived at this answer / what to plug in.
Thanks for the help!