Logic Level 1

In a certain country, each couple stops having children if and only if they have a female. After many generations, what will the sex ratio in this country be?

Details and Assumptions:

  • The only exception to the rule stated above is for multiple births (twins, triplets, etc.). After a multiple birth with any number of female children, the couple stops having children.
  • Assume that all couples are capable of having female children, and that the chance of either gender is equal for each birth.
  • Assume that life expectancy is the same for males and females.

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