Hello. You could not tell or say, what probability of a birth healthy...

[Svetlana]

Hello. You could not tell or say, what probability of a birth of the healthy child at chetverojurodnyh the brother and the sister. What it is necessary to make that the risk of a birth of the sick child was minimal? Thankful in advance

[Andrey]

Probability of a birth same as well as from not the relative