Incomplete and Irrelevant Question


#1

Proportion of Boys to Girls will have 2 answers depending on what is expected gender.
Say expected gender = Girl (since specific)
B + BG + BBG + BBBG + BBBBG + BBBBBG + BBBBBBG + … + BBBBB…BG
1 boy -> 0 girl
2 boys -> 1 girl
3 boys -> 1 girl
4 boys -> 1 girl


n boys -> 1 girl
proportion of boys to girl = (n(n+1)/2)/(n-1) ~ (n+1)/2
OR
2/(n+1)