document.write( "Question 1124566: The average age of three girls is seventeen years four months. The average age of two of them is seventeen years three months. How old is the third girl? \n" ); document.write( "
Algebra.Com's Answer #740865 by Boreal(15235)\"\" \"About 
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total=average*n, by rewriting the definition of an average
\n" ); document.write( "total=17 (1/3), for 4 months is 1/3 of a year *3=52
\n" ); document.write( "two have a total of 17 (1/4)*2=34 (1/2)
\n" ); document.write( "The third girl is 52-34 (1/2)=17 (1/2) or 17 years 6 months
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