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Ubisoft Programmer Interview Question

"If a couple has two children, what is the probability that one is a girl and one is a boy?"
Tags: math logic
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Part of a Programmer Interview Review - one of 47 Ubisoft Interview Reviews

Answers & Comments

3
of 3
votes
1/2
- Interview Candidate on Aug 1, 2009 Flag Response
1
of 10
votes
1/4

1/2 x 1/2 = 1/4
- Anonymous on Sep 30, 2010 Flag Response
4
of 5
votes
It's a 1/2.

The first child can be either a boy or a girl, for the second child to be the opposite gender the probability is 1/2.

Or another way

Boy Boy 1/4

Boy Girl ] 1/4 +
Girl Boy ] 1/4 =1/2

Girl Girl 1/4
- Anonymous on Oct 20, 2010 Flag Response
0
of 4
votes
Why would they need to ask a biological question like that when it comes to game programmer? Unless if it's about your math skills instead of biology skills, what do they care?
- Nathan on Apr 27, 2011 Flag Response
2
of 2
votes
1/2 anyday.
- Jatin Rai on Jul 4, 2011 Flag Response
1
of 1
vote
1/2*1/2 + 1/2*1/2 = 1/2
boy & girl or girl & boy
- Anonymous on Aug 21, 2012 Flag Response
0
of 3
votes
boy + boy
girl + girl
boy+girl or girl +boy
so 3 different posibilities : 1/3
- ALFONSO RODRIGUEZ on Mar 7, 2013 Flag Response

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