Question is incomplete or the answer is not correct


The actual solution to the question will include two factors which are no. Of trails and the population and percent baising to boy or girl, if we take no. Of trials to large no. Then the approximate resulting equation will be
f(x) = 1.01x -1/0.01x+1
Where x = total_population_percent/biased_population_percent for boy/ girl.
Atleast there should be defined that how much biased population is there,
So, the answer given one can never be the only correct answer according to me, the answer 1 which you have provided is also one possible outcome of above equation when x=2 or population equally devided in biasing, i.e. 50 percent boy and 50 percent girl.