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- Sep 17th 2009, 05:31 PM #1

- Joined
- Sep 2008
- Posts
- 24

## Need Help

Can you help me with this, please?

Coin #1 has a probability 0.7 of coming up H.

Coin #2 has a probability 0.6 of coming up H.

It we flip coin and get H, what is the expected number of additioanal flips needed until we get the pattern TTHTHTT?

Thank you!