document.write( "Question 1164179: Five families each have two daughters and no sons. Assuming boy and girl babies are equally​ likely, what is the probability of this​ event? \n" ); document.write( "
Algebra.Com's Answer #788488 by Edwin McCravy(20064)\"\" \"About 
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document.write( "For each family:\r\n" );
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document.write( " X   p(X)\r\n" );
document.write( "BB   1/4\r\n" );
document.write( "BG   1/4\r\n" );
document.write( "GB   1/4\r\n" );
document.write( "GG   1/4\r\n" );
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document.write( "1/4 of the time the first family will have two girls, \r\n" );
document.write( "and 1/4 of those times the second family will also have two girls. \r\n" );
document.write( "Then 1/4 of those times the third family will also have two girls.\r\n" );
document.write( "Then 1/4 of those times the fourth family will also have two girls. \r\n" );
document.write( "Then 1/4 of those times the fifth family will also have two girls.\r\n" );
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document.write( "That's (1/4)(1/4)(1/4)(1/4)(1/4) = (1/4)5 = 1/45 = 1/1024.\r\n" );
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document.write( "Edwin
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