djano likes to roll the dice, but he hates to roll anything but 7 or 11. when other rolls come up he just ignores them and rolls again until he gets 7 or 11. if this is the case, what is the probability that he will roll a 7 before he rolls an 11?

Question

djano likes to roll the dice, but he hates to roll anything but 7 or 11. when other rolls come up he just ignores them and rolls again until he gets 7  or 11. if this is the case, what is the probability that he will roll a 7 before he rolls an 11?

anonymous · Answer

wouldn't be the difference in probabilities?

{(# of ways to role 7) - (# of ways to role 11)}/(total number of possible roles)

anonymous · Answer

thanks!!

anonymous · Answer

no problem, lol. I like to think of difference of probability in terms of, "such-and-such an event is % more probable than other-event" ... kinda clarifies thinking in some cases. XD