SOLUTION: Lindsie wants to see how many times she needs to roll a standard number cube before getting a 1. What is the probability Lindsie will roll a 1 on her fifth roll and not before?

SOLUTION: Lindsie wants to see how many times she needs to roll a standard number cube before getting a 1. What is the probability Lindsie will roll a 1 on her fifth roll and not before?

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Question 875889: Lindsie wants to see how many times she needs to roll a standard number cube before getting a 1. What is the probability Lindsie will roll a 1 on her fifth roll and not before?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
p = 1/6 (on an average: roll 6 times before getting a 1)
P= 1/5[(5/6)(5/6)(5/6)(5/6)(1/6)]
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