# Roll two 6-sided dice and examine their sum

**Question description**

a) how long will it take to roll a pair of ones

b) What is the probability of rolling a sum of 7 on the first roll

c) what is the probability of rolling a sum of 7 on the fourth roll

d) What is the probability of rolling a sum of 7 by the fourth roll

e) what is the probability of it taking more than 10 rolls to roll the sum of 7

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