

Or alternatively, 75% of the questions cover 10% of the topics in this group -
making them frequently asked.

So the other 25% cover 90% of the topics, making them rarely asked and thus in
sore need of answering ...

--
Chris Lilley
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Technical Author, ITTI Computer Graphics and Visualisation Training Project
Computer Graphics Unit, Manchester Computing Centre, Oxford Road, 
Manchester, UK.  M13 9PL                        Internet: C.C.Lilley@mcc.ac.uk 
Voice: +44 (0)61 275 6045  Fax: +44 (0)61 275 6040 Janet: C.C.Lilley@uk.ac.mcc