Acouple has 5 children, all sons. if the woman gives birth to a sixth child, what is the probability that the sixth child will be a son?

50%

Step-by-step explanation:

The probability to have a son or a daughter is the same, no matter if u have another child. that means you got the 50% of chance to get a son or 50% you don´t give birth to a son.

But there is a study that says if a man have to many brothers he will had many sons.

1/2 or 50%

Step-by-step explanation:

The child would either be female or male, so the probability would be 1/2.