See? Easily done, Mah. Ok, here is a new one.
"In an overcrowded country, the government decrees that families must stop having children as soon as they have a son, so some families have just a son, some have a son and daughter, some a son and two daughters etc., and some just daughters. In this country, will boys outnumber girls or vice versa?"
Please try not to be too clever about this one; obviously we want the most LIKELY outcome, not a range of variables.