Monday
September 1, 2014

Homework Help: Stats/ Probability

Posted by denim on Sunday, September 29, 2013 at 9:20pm.

Repeated die toss experiment. A fair die is tossed repeatedly, and the sequence of numbers that turn up is recorded, until a 1 is
obtained. When a 1 is obtained, the experiment is over, but the 1 is included in the sequence. Thus every outcome is a sequence of integers ending
in 1. Let X be the sum of the sequence of numbers obtained in the experiment. So the smallest possible value of X is 1, corresponding to the outcome
in which a 1 is obtained on the first toss.

Compute P(X=5).

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