Children's Probabilities

Probability Level 4

A couple has two kids. One is female. What is the probability of the other one be male?

(Assume that for any given pregnancy the respective probabilities that a male or female are conceived are the same.)

66.6% 33.3% 25% 50% 75%

Alan Rocha by Alan Rocha , 40, Brazil

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

Alan Rocha
Aug 24, 2016

Female = F; Male = M; All possible combinations (First kid - Second kid): (F - M) , (F - F) , (M - F) and (M - M); We know (M - M) is not possible. So there are 3 possibilities, 2 of them with M. 2/3 = 66.6%.

0 Helpful 0 Interesting 0 Brilliant 1 Confused

I don't think that if you are considering first kid-second kid that m-f should be a possibility since we know that first kid is f. So this leaves f-f and f-m ,equally likely, so 50% seems reasonable. Ed Gray

Edwin Gray - 2 years, 9 months ago

I don't think that if you are considering first kid-second kid that m-f should be a possibility, since we know that first kid s f. So this leaves 2 choices f-f and f-m, equally likely, so 50% seems reasonable. Ed Gray

Edwin Gray - 2 years, 9 months ago

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...