What is the probability of having two children and both of them being female?

There is a 50/50 chance of being a boy or a girl for both children. The genders of both children are mutually independent (mathematically speaking, this means that the outcome of one random event does not effect the outcome of another event; in this case, the gender of one child does not effect the gender of another.)

Has 2 kids and one of them is a boy what is the probability that the other child is also a boy you can assume that there are an equal number of boys and girls in the world?

All with equal probability, so the answer is 2/3. Another way to win the answer would be asking the man: ‘Tell me how many children you have and tell me the gender of one of your children’ Then the man could say: ‘I have two children and one of them is a boy’.

What is the probability of having a baby boy if the couple already got 3 children that are all female?

If you already have a boy, the chance that the next baby is also a boy is 50 percent

	All same sex
2 children	50\% G/B
3 children	25\% all girl or all boys
4 children	12.5\% all girls or all boys	50\% BB/GG
5 children	6.25\% all boys or all girls	68.75\% GGG/BB or BBB/GG

What are the chances of having one boy and one girl?

The odds of having a girl or a boy are the same with a one in two chance of it being one or the other. 50/50 if you like.

Is it equally likely to have a boy or girl?

The ratio of male to female births, called the sex ratio, is about 105 to 100, according to the World Health Organization (WHO). This means about 51\% of deliveries result in a baby boy.

What is the chance of having 3 girls?

There is hence a 1 in 2 chance (50\% or 0,5 probability) of either a boy or a girl on each occasion. Therefore, by the multiplication principle, the probability of having 3 girls in a row is 12×12×12=18 . The sex of the 4th child is independent of the sexes of the previous 3 and hence is once again 12 .