this post was submitted on 03 Dec 2023
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[–] [email protected] 3 points 1 year ago (2 children)

You’ve also ruled out TH by knowing one is heads. So the only possibilities are HT and HH. Is that not 50/50?

[–] [email protected] 3 points 1 year ago (1 children)

At least one is heads, but unless you know which one it is, you haven't ruled out HT or TH

[–] [email protected] 7 points 1 year ago* (last edited 1 year ago)

But you do know which one it is, because you said "other child". As soon as you ask the question, you assign a specific outcome to a specific child eliminating HH and HT (or in the new example, BB and BG). "What are the odds they have a female child" and "what are the odds the other child is female" are not the same question.

[–] [email protected] 3 points 1 year ago

it depends on how you know this information. did you look at one of the coins? then it's 50/50. did you ask a friend to look and yell you whether at least one of them is heads? then it's 2/3.