first child of the man is boy this is certain, second being boy is 1:2 possibility. (man's possibilities BG and BB = %50 BB)

woman's children's genders are unknown. possibility of the first child to be a boy is 1:2, possibility of ALSO the second child being boy is 1:4.(woman's possibilities = BB,BG,GG,GB = %25 BB)

if the one is boy, possibilites are BB BG and GB = 1:3



Last edited by Quadraxas; 06/05/10 22:51.
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