A family has three children. What is the probability that at least one of them is a boy? According to me there are $4$ possible outcomes:
$$GGG \ \ 
BBB \ \ 
BGG \ \
BBG $$
Out of these four outcomes, $3$ are favorable. So the probability should be $\frac{3}{4}$.
But should you take into account the order of their birth? Because in that case it would be $\frac{7}{8}$!

I’m adding an answer since I’m not reputable enough to add a comment to “lab bhattacharjee”’s answer. There are some assumptions to consider here: 
Assuming that the family is generated the old fashioned way then “lab bhattacharjee”’s answer is mostly correct with only a few more explicit assumptions, as follows.


*

*Assuming that the slight natural skew towards human male progeny is ignored

*Assuming adoption is not under consideration

*Assuming modern medical reproductive techniques are not being used, including...

*Assuming no selective abortion, then only...

*Assuming we are counting the children and not the parents. Because given that the father is male, that makes the “real” answer to this question, as given by “Niharika” and edited by “Ric Ped”, out to be 100% and no statistics are needed 

