<t>Hi Eddi,2 questions1) Shouldnt the denominator be (Pr(selected boy&newborn is a boy) + Pr(selected boy&newborn is a girl))? Otherwise you have to use something like this: P(B) = P(A&B) + P(A'&B) = P(B|A) P(A) + P(B|A')P(A') (ref. wikipedia)2) Could you please explain to me why the...

<t>Hi Wileyw,and thank you for your quick reply! I have read the indicated thread and I would like to ask you if it is possible to tell me how you came up with this solution. The tree we have created is described as follows:Boys (2/6)Girls (3/6)Random (1/6) which continues to another tree with total...

<t>Hi all,Got the following question in an interview and due to the different answers i got from friends I would like your opinion too.In a hospital room for newborns, there are 2 boys and 3 girls. A woman gives birth to a baby and this is also added to the room. we randomly select 1 baby and it is ...

Hi all,Thanks for the answers. 4ndre1 your reasoning is very clear.Thanks,

Thanks 4ndre1 for the quick reply. Could you please tell me what x represents?Thanks again

<t>Hi Guys,I am a newbie to probs so I would really appreciate if something could give me his/her opinion on the following brainteaser.2 coins are tossed. if you get 2 H you get $0. if you get 1H and 1T (or vice versa) you get $1. If you get 2 T you play again. What is the expected value? I think is...