You are right to point that out. I think that the spirit of the question assumes equal probability of 50% B,G for each birth independent of previous births and statistics in order to make it a probability and logic question, and not one of biology.
You are right to point that out. I think that the spirit of the question assumes equal probability of 50% B,G for each birth independent of previous births and statistics in order to make it a probability and logic question, and not one of biology.