Filtering and then counting distinct values

Posted by Deon on Stack Overflow See other posts from Stack Overflow or by Deon
Published on 2009-11-06T22:04:05Z Indexed on 2010/04/20 0:03 UTC
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This is for Excel: I've been tasked with counting distinct records after I have filtered the data. I have 330 rows with column A containing the 'name' and in Column B I have the name of a test that was done for each 'name', which each 'name' could have taken several iterations of the same test. The test results are in Column C.

Col A -Student  Col B -Exam          Col C - Grade
Student 1       Exam 1              .80
Student 2       Exam 1              .50
Student 3       Exam 1              .90
Student 2       Exam 1              .75
Student 4       Exam 1              .90
Student 5       Exam 1              .55
Student 2       Exam 2              .90
Student 1       Exam 2              .90
....            ....                ...

If I filter col B for Exam 1, I want to count the unique number of students that have taken Exam 1.

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