document.write( "Question 1145774: The Wilson family was one of the first to come to the U.S. They had 4 children. Assuming that the probability of a child being a girl is .5, find the probability that the Wilson family had at least 3 girls? At most 3 girls? \n" ); document.write( "

Algebra.Com's Answer #767020 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "(a)  At given conditions, the probability to have at least 3 girls \r\n" );
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document.write( "         P( to have at least 3 girls ) = P(3) + P(4) =  +  =  +  = .    ANSWER\r\n" );
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document.write( "(b)  At given conditions, the probability to have at most 3 girls is equal\r\n" );
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document.write( "     to the COMPLEMENT of the probability to have 4 girls.\r\n" );
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document.write( "         P( to have at most 3 girls ) = 1 - P(4) = 1 -  = 1 -  =  = .   ANSWER\r\n" );
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