document.write( "Question 1045363: Helen was 13 years old on her birthday and the average age of her four friends was 12 years 2 months. If the average age of all six children was 11 years 5 months, how old was her brother Paul? \n" ); document.write( "

Algebra.Com's Answer #660893 by AnlytcPhil(1807) $\"\"$ $\"About$

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Helen was 13 years old on her birthday and
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document.write( "Everything is in months in this problem.\r\n" );
document.write( "There are 12 months in a year.\r\n" );
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document.write( "So Helen is 13x12 = 156 months old.\r\n" );
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\n" ); document.write( "the average age of her four friends was 12 years 2 months.
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document.write( "That's 12x12+2 = 144+2 = 146 months.\r\n" );
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document.write( "So the sum of the 4 friends ages in months is 4x146 = 584 months.\r\n" );
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\n" ); document.write( "If the average age of all six children was 11 years 5 months.
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document.write( "That's 12x11+5 = 132+5 = 137 months.\r\n" );
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document.write( "So the sum of the 6 children's ages in months is 6x137 = 822 months.\r\n" );
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document.write( "                                        6\r\n" );
document.write( "So Paul is 82 months old, which is  12)82 \r\n" );
document.write( "                                       72\r\n" );
document.write( "                                       10\r\n" );
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document.write( "6 years and 10 months.\r\n" );
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document.write( "Edwin

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