document.write( "Question 1156415: A couple plans to have four children assuming the boys and girls are equally likely find a property at the couple we have at least one boy \n" ); document.write( "

Algebra.Com's Answer #779099 by Theo(13342) $\"\"$ $\"About$

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the probability that it's a boy is .5
\n" ); document.write( "the probability that it's a girl is .5
\n" ); document.write( "the probability that, out of 4 children, at least one of them will be a boy is equal to 1 minus the probability that none of them will be boys.
\n" ); document.write( "since the probability that it's a boy is .5, then the probability that it's not a boy is also .5.
\n" ); document.write( "the the probability of 0 boys of of 4 is .5 * .5 * .5 * .5 = .0625.
\n" ); document.write( "1 - .0625 = .9375.
\n" ); document.write( "that's the probability that at least one of them will be a boy.
\n" ); document.write( "if you look at the al the probabilities, you will get a chart such as the one shown below.\r
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\n" ); document.write( "\n" ); document.write( " $\"$$$\"$ \r
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\n" ); document.write( "\n" ); document.write( "the total probability is equal to 1 as it should be.\r
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