Answer:
It is a 9/10 chance of having at least one boy. The probability is also high enough for the couple to be very confident in having at least one boy in 9 children.
Step-by-step explanation:
I listed all of the possible combinations below
GGGGGGGGG Â Â Â Â Â BGGGGGGGG
BBGGGGGGG Â Â Â Â Â BBBGGGGGG
BBBBGGGGG Â Â Â Â Â BBBBBGGGG
BBBBBBGGG Â Â Â Â Â Â BBBBBBBGG
BBBBBBBBG Â Â Â Â Â Â BBBBBBBBB
Total number of combinations with at least one boy is 9/10
This is a very high percentage, which means the couple is very likely to have at least one boy.