document.write( "Question 1031271: the average age of 3 children in the family is 9yrs. if the average age of their parent is 39 yrs,the average age of the whole family is........... \n" ); document.write( "
Algebra.Com's Answer #646027 by ikleyn(52814)\"\" \"About 
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\n" ); document.write( "the average age of 3 children in the family is 9yrs. if the average age of their parent is 39 yrs,the average age of the whole family is...........
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document.write( "\"%283%2A9+%2B+2%2A39%29%2F5\" = 21 year.\r\n" );
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