document.write( "Question 328029: If a family has six children, how do i calculate the probability that at least one is a girl? \n" ); document.write( "

Algebra.Com's Answer #234911 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
You could look at the sample space of all possible combinations.
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\n" ); document.write( "BBBBBG
\n" ); document.write( "BBBBGB
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\n" ); document.write( "GGGGBG
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\n" ); document.write( "There are 2^6=64 of them and then count the ones that have a G in it.
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\n" ); document.write( "At least one girl means not all boys.
\n" ); document.write( "P(all boys)+P(not all boys)=1
\n" ); document.write( "P(at least 1 girl)=1-P(all boys)
\n" ); document.write( "P(at least 1 girl)= $\"1-1%2F64\"$
\n" ); document.write( "P(at least 1 girl)= $\"63%2F64\"$ \n" ); document.write( "

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