Anonymous

# A couple has already two daughters and they want another child. They are hoping to get a son this time.?

A couple has already two daughters and they want another child. They are hoping to get a son this time. What is the probability of them getting a son this time?

A.24%

B.100%

C.0%

D.75%

E.Unable to determine.

F.50%

Relevance
• Robert
Lv 6
2 months ago

Hello,

These are the relevant details, from research on the Internet:

* Proportion of male to female sperm cells in the sperm fluid, are almost equal:

https://www.sjsu.edu/faculty/watkins/sexratio.htm#...

* A woman can preserve sperm inside her, for between 3 to 5 days:

https://www.nhs.uk/conditions/pregnancy-and-baby/g...

* Female sperm live longer than male sperm inside the woman:

* Male sperm (may) swim faster than female sperm

[Disputed: Male sperm swim faster than female sperm: ]

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC14406...

Taking above into consideration:

What happens if, upon sexual intercourse, a woman has an egg ready?

Likelihood is a boy, that is: IF male sperm do swim faster than female sperm !

What happens if upon sexual intercourse, a woman does not have an egg ready, but preserves the sperm, and then her egg becomes ready within 3 to 5 days?

Likelihood (increasing as this time goes by) is a girl, because the female sperm live longer than the male sperm.

I hope this helps.

Robert.