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An acquaintance tells you she has two children and you ask her if at least one of them is a boy. She says yes. Assuming every birth has an equal chance of being male or female and you have no additional information about the children, what are the chances that both of her children are male?
2007-09-14 12:02:44 · 5 answers · asked by J S 2 in Science & Mathematics ➔ Mathematics
The chance is 1 in 3
2007-09-14 12:07:49 · answer #1 · answered by peaceablefruit206 7 · 0⤊ 0⤋
50%. You already have a guaranteed boy. The only other option is a girl. So, it could be a boy or a girl. That is 50% for each.
2007-09-14 19:11:23 · answer #2 · answered by Serena 7 · 0⤊ 0⤋
50%
Yeah there is a 25% she has two... BUT you already know she has one so the chances of her having another boy is 50 and a girl is 50% so the double...I think
2007-09-14 19:12:13 · answer #3 · answered by Anonymous · 0⤊ 0⤋
the possibilities are BB BG GB GG - equally likely.
You have eliminated GG
So probabilty of BB is 1/3
2007-09-14 19:13:50 · answer #4 · answered by Beardo 7 · 0⤊ 0⤋
problematic thing. search onto the search engines. this can assist!
2014-11-05 03:22:49 · answer #5 · answered by Anonymous · 0⤊ 0⤋