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The more sons you have, the more likely that one of them is born on a tuesday. Thus, if you take all the two-child families with at least one son, and eliminate
by extension 15y ago
The more sons you have, the more likely that one of them is born on a tuesday. Thus, if you take all the two-child families with at least one son, and eliminate the families without a son born on tuesday, the two-boy families are more likely to remain than the one-boy families, and you will end up with a higher proportion of two-boy families than before.
Simple.
(edited)
- gcp 15y agoSimple. And wrong. Note that the correct answer is 13/27 probability of a boy, which is less, not more, than 50%.
- extension 15y agoSorry, I should have said a higher proportion of two-boy families, not a higher proportion of boys. 13/27 is more than 1/3, which is the proportion of two-boy families before you eliminate the families without tuesday boys.