(Solved): Exam Problem: You repeatedly roll a fair six-sided dice until you observe the sequence of rolls \( ...

Exam Problem: You repeatedly roll a fair six-sided dice until you observe the sequence of rolls \( \{6,5,4\} \) (in that order). On average, how many rolls do you expect it to take for you to observe this sequence of rolls? (a) 180. (b) 210 . (c) 216. (d) 256. (e) None of the above. a. 180 b. 210 c. 216 d. 256