9no dude i was refering to conditional prob
P(bg/b) = P(bgΛb)/P(b) = 2/3
Your friend has two children. You meet one of them and find out that he is a boy. What is the probability that the other child is a girl?
P.S. - A child can only be a boy or girl
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37 Answers
1out of two one child is fixed
we have to find possi of a girl as second child from possibility of b,g
so 1/2
think celes
9no dude i was refering to conditional prob
P(bg/b) = P(bgΛb)/P(b) = 2/3
91ya bt i dont see the conditions for cond prob
anyways the Q for mag. dipole mom. is interesting share ur views akand & celes
1i don't think you should take gb and bg as different as it is not given if the child met is first child or second... so only the diff cases - bb,gg,bg should be taken.
9u must take bg ,gb as diff
during child birth gettin a mixture of boy,girl is more favourable.
if u take bg,gb as same theres a contradiction
9a commonsense view uld tell that 1/2 can never be ans as already a boy is found so prob of gettin another boy wud be lesser
