[xsl] Getting average

Subject: [xsl] Getting average
From: "Chaudhary, Harsh" <HCHAUDHA@xxxxxxxxx>
Date: Tue, 27 May 2008 15:13:57 -0500

I have an XML file in the following format:

	<group income=1000>
		<person age=10/>
		<person age=15/>
		<person age=30/>

	<group income=2000>
		<person age=10/>
		<person age=40/>

	<group income=5000>
		<person age=20/>
		<person age=20/>

I would like to find the average of incomes for people of a particular
age? I am using XSLT 1.0. A double pass is not practical. Maybe this is
stupid simple and I am missing something basic, but I would appreciate
some help on this.


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