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ExamsNEETBiology

A mother in a family of five daughters is expecting her sixth baby. The chance of its being a son is

  1. zero
  2. 25%
  3. 50%
  4. 100%

Correct answer: 50%

Solution

The sex of the next baby is determined independently of the five daughters already born. Assuming equal likelihood of boy or girl, the chance of a son is 1/2, or 50%.

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