與性愛有關名稱
2023-2-20 13:23:46
(Elder, Younger)
S = {(B, B) (B, G) (G, B) (G, G)}
If we know one of the two must be a boy, then we are left with
S = {(B, B) (B, G) (G, B)}
Event A: Both children are boys
Thus, P(A) = (1/3)
與性愛有關名稱
2023-2-20 13:41:10
You are asking why (Older sister, Joe) is not a possible outcome, and I am answering why that is in fact, a possible outcome.
I never said (Joe, Younger brother) and/or (Older brother, Joe) were not possible outcomes?
Why13579
2023-2-20 13:43:13
then there will be four total possible outcomes, where two of the possibilities, joe’s sibling will be a brother