# Homework Help: A probability questoin

1. Aug 30, 2009

### smk037

1. The problem statement, all variables and given/known data

A new lifeform has been discovered in the sea. In particular, these sea-creatures
come in THREE sexes, which are indistinguishable (except by other sea-creatures). If A robot captures N specimens, what is the probability these
chocies will allow a “mated triple” with its promise of more little sea-creatures to come?

2. Relevant equations
This homework is supposed to be on conditional probabilities and counting methods, so I suppose Baye's Theorem and Law of Total Probabilities would be useful

3. The attempt at a solution
Unfortunately, I truly have no idea where to begin this problem.
Any ideas?

2. Aug 30, 2009

### Elucidus

I suspect you are to assume the genders are equally likely in the sea-creature population.

I would first try this indirectly but trying to calculate the probability that all N creatures belong to two identical genders.

--Elucidus