Posted by Justin on Wednesday, December 9, 2009 at 8:55pm.
in a family with two children, what are the probabilities of two boys, the first is a girl the second is a boy, neither is a girl, at least one girl, assuming that the birth of boys and girls is equally likely.

math  PsyDAG, Thursday, December 10, 2009 at 10:42am
The different possibilities are:
bb
bg
gb
gg
From this, you can figure out how many of the four possibilities fit. (Having two boys is the same as having no girls.)
I hope this helps. 
math  Vonne, Wednesday, May 19, 2010 at 9:13pm
in a family with two children, what are the probabilities of two boys, the first is a girl the second is a boy, neither is a girl, at least one girl, assuming that the birth of boys and girls is equally likely.
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