Posted by **sand** on Tuesday, January 24, 2012 at 1:15am.

Consider a collection of n biased coins, each showing Heads with probability p and Tails with probability 1-p , independently of the others. The coins are tossed and all coins showing Heads are collected together and tossed again. Write down an expression for the probability mass function of the random variable representing the number of Heads that turn up in the second round of tosses. Hint: Condition on the results of the first round of tosses using the “total probability" formula.

## Answer This Question

## Related Questions

- Math-Probability - Consider a collection of n biased coins, each showing Heads ...
- Math-Probability - Consider a collection of biased coins, each showing Heads ...
- math answer check - Three coins are tossed, and the number of heads observed is ...
- Math - Four coins fall onto the floor. Find the probability that (a) exactly ...
- Advanced Math - The probability of getting 2 heads and 1 tail when three coins ...
- probability - you have 16 coins that are heads up and 18 coins that are tails up...
- math - you have16 coins that are heads up an18 coins that are tails up. After ...
- Math (please help!) - You have 16 coins that are heads up and 18 coins that are ...
- Math - You have 16 coins that are heads up and 18 coins that are tails up. After...
- Math - You have 16 coins that are heads up and 18 coins that are tails up. After...

More Related Questions