- #1

- 768

- 4

## Homework Statement

The probability of an experiment is p. Show that the expected number of trials for two successes in a row is [itex] \frac{p+1}{p^2} [/itex]

I just don't know what distribution to work with here.

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- Thread starter ArcanaNoir
- Start date

- #1

- 768

- 4

The probability of an experiment is p. Show that the expected number of trials for two successes in a row is [itex] \frac{p+1}{p^2} [/itex]

I just don't know what distribution to work with here.

- #2

- 30

- 0

http://math.stackexchange.com/quest...n-a-row-at-the-k-th-bernoulli-trial-geometric

The discussion covers the derivation of the distribution's pmf and PGF.

- #3

- 768

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Thank you very much :)

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