Hi Louis,
I counted (find WHFreeman/. -type f | egrep '\.pg$' | wc -l) 853 pg files in NPL/WHFreeman, and 2009 pg files in their complete collection. So, I think the answer is "about 2000" and "about 42%".
BTW, if you find any bugs in those problems, please report them on bugzilla.
Thanks,
Jason
WeBWorK Main Forum
Rogawski Calculus Text
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