Let X be a random variable representing the number of times you need to roll (including the last roll) a fair six-sided dice until you get 4 consecutive 6's. Find E(X)?(adsbygoogle = window.adsbygoogle || []).push({});

answer is 1554.

I get confused with this, probability { X > n-5 }. I know that the last for throws must be 6's and the one before 'n-4 throws' must not be a 6. Any input please?

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# Let X be a random variable representing the number of times you need to roll (includi

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