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a man has six daughters what is the probability of next child being a son 10% 50% 100% 75%

a man has six daughters what is the probability of next child being a son
  1. 10%
  2. 50%
  3. 100%
  4. 75%

Grade:12

2 Answers

Gaurav
askIITians Faculty 164 Points
6 years ago
Hello student
correct answer is 2. 50%
50% because anyone never predict that next child is boy or girl
As it is a independent event the probability would be always 50% whaterver be the previous family history.
female have two X chromosomes
male have one X and one Y chromosome
so cross gives two X chromosomes and one XY chromosome.
Raheema Javed
156 Points
6 years ago
The correct answer is (2) 50%.

When there is a cross between XY and XX, the gametes that form are XY, XX, XY and XX. That means there is 25% probability for each gamete to be formed. So there will be 50% probability of a son or a daughter to born.
Therefore no matter how many children are born, the probability that the next child is son or a daughter will always be 50%.

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