Texas Instruments TI-89 Manual Book page 30

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Percentage of incorrect answers out of the total number of
answers
This example shows results for a study session using
choice cards.
To determine the most difficult cards, sort the same results in
descending order by the percentage of incorrect answers:
1. Press „
2. Select
TI-89/TI-92 Plus/Voyage™ 200 PLT StudyCards™ Viewer
Results are sorted in ascending order by title.
. The Sort dialog box appears.
Sort
and press ¸.
2:Descending
multiple-
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