Can I have a detailed, step-by-step explanation for the following question? Thank you! The ratio of boys and girls at birth in Singapore is quite high at 1:09 : 1. What proportion of Singapore...

Can I have a
detailed, step-by-step explanation
for the following question?

Thank you!

The ratio of boys and girls at birth in Singapore is quite high at 1:09 : 1.
What proportion of Singapore families with exactly 6 children will have at least 3 boys?
(Ignore the probability of multiple births.)