Hi, help with probability! I'm not sure at all how to answer this question. Suppose that you roll a pair of fair dice. a) what is the probability that the sum is at least 8? b) what is the probability that the sum is not 7? c) given that you roll a sum of 7 on the first roll, what is the probability that you roll a sum of 7 on the second roll? d) what is the probability that you roll a sum of 7 two times in a row?

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anonymous · Answer

if you can help me with any of those questions.. it'd be greatly appreciated!

anonymous · Answer

it would really help to make a 6 by 6 table of all possible outcomes
then you could do this question by counting

anonymous · Answer

http://openstudy.com/study#/updates/518b140ce4b03a1adc628f2b

anonymous · Answer

Ooh! Awesome thanks for the link. I will give it a go!

anonymous · Answer

I tried using the chart. And for the first question "what is the probability that the sum is at least 8?" I got 5/36=.138. Which is wrong cuz the answer =.417 What did I do wrong? :(