These events are independent; so the probability of a girl is 0.5.
In a family with four children, the probability of having four boys is 1 in 16.
25
1/8
1/4
50/50
50/50
Since the probability of having a son is about 1/2, the probability of the first 4 children being boys is about (1/2)4.
The probability of having 2 boys and 1 girl in a family with three children can be calculated using the binomial probability formula. Assuming the probability of having a boy or a girl is equal (1/2 each), the probability of having 2 boys and 1 girl can be found by considering the different combinations (BBG, BGB, GBB). Therefore, the probability is ( \frac{3}{8} ) or 37.5%.
In a family with four children, the probability of having four boys is 1 in 16.
25
If we consider there is a 50% chance for having a boy and 50% for having a girl*, there is : - 12,5% chance of having no boys; - 37,5% chance of having 1 boy; - 37,5% chance of having 2 boys; - 12,5% chance of having 3 boys. Therefore, there is 50% chance of having at least two boys. *The odds are more like 51% for having a boy and 49% for having a girl, but it doesn't really matters.
1/8
The probability of having a boy or a girl in any single birth is generally considered to be approximately equal, around 50% for each gender. Therefore, even if a couple has 5 boys, the probability of their next child being a boy remains 50%. Past births do not influence the outcome of future births due to the independence of each event.
3/8
Assuming that having boys and girls are equally likely, then the probability is 1/8. * * * * * You also need to assume that the children's genders are independent. They are NOT and depend on the parents' ages and genes.
1/4
Assuming the probability of having a boy is 1/2, and that the probabilities are independent: Probability of 1 girl and 12 boys = (1/2)13 * 13 = 0.001587..., which is around 1/630