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I have two children. One is a girl who is full of grace because she was born on a Tuesday.
What do you think is the probability that my other child is a girl?

What do you think?

  • 1 vote
  • 9 votes
  • 1 vote
  • 1 vote
waitingforgodo 7 Aug 28
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0

"one is a girl"..... Leading me to conclude the other is a boy

1

The probability of an unknown person being a certain sex is always very close to 50%, regardless of how many siblings they have of a one sex or the other (e.g. a couple that had 14 children who were all girls still has ~50% chance the next one will be another girl.)

13/27

[en.wikipedia.org]

@waitingforgodo
I read the first couple sections and didn't get to the 13/27 part. To be honest, I didn't even see that as an option, just looked for the 1/2 and clicked, but I did say ~50%.

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