Martha and sarah leave block p and q towards q and p respectively simultaneously and travel in the same route. After meeting eac
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Answer:
eventually the gender ratio of population in this society will be 50% male and 50% female.
Step-by-step explanation:
For practical purposes we will think that every couple is healthy enough to give birth as much children needed until giving birth a girl.
As the problem states, "each couple continue to have more children until they get a girl and once they have a girl they will stop having more children". Then, every couple will have one and only one girl.
- This girl would be the n-th child with a probability
.
We will denote for P(Bₙ) the probability of a couple to have exactly n boys.
Observe that statement 1 implies that:
.
Then, the average number of boys per couple is given by
This means that in average every couple has a boy and a girl. Then eventually the gender ratio of population in this society will be 50% male and 50% female.