Homework Help: Which distribution to use?

1. Oct 24, 2011

ArcanaNoir

1. The problem statement, all variables and given/known data
The probability of an experiment is p. Show that the expected number of trials for two successes in a row is $\frac{p+1}{p^2}$

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

2. Oct 25, 2011

canis89

3. Oct 25, 2011

ArcanaNoir

Thank you very much :)