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http://moshkow.livejournal.com/ (
moshkow.livejournal.com
) wrote
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sly2m
2016-11-07 08:20 pm (UTC)
no subject
Пусть число семей в стране = N.
Соответственно - за вычетом старшей - остальных девочек N-1, остальных детей 2*N-1
Итого (N-1)/(2*N-1)
N=1 - 0%
N=2 - 33%
N=3 - 40%
...
при достаточно больших N стремится к 50%
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no subject
Соответственно - за вычетом старшей - остальных девочек N-1, остальных детей 2*N-1
Итого (N-1)/(2*N-1)
N=1 - 0%
N=2 - 33%
N=3 - 40%
...
при достаточно больших N стремится к 50%