You roll a fair four-sided dice. If the first result is 1 or 2 , you roll once more but,
otherwise, you stop. What is the probability that the sum total of your rolls is at least 4?
3. You roll a fair four-sided dice. If the first result is 1 or 2, you roll once more but, otherwise, you stop. What is the probability that the sum total of your rolls is at least 4?