Question

1. You roll a die until you get four sixes (not necessarily consecutive). a. What is...

1. You roll a die until you get four sixes (not necessarily consecutive).

a. What is the mean and standard deviation of the number of rolls you will make?

b. What is the mean and standard deviation of the number of not 6 rolls you will make?

Math   Statistics-And-Probability   
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Answer #1

Here the event is we throws a die until 4 sixes come.

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