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List of fixes
A bold A indicates that the error appears in the appendix of
the final exam.
 A Pigeonhole principle: n and k were switched in the
statement of the generalised pigeonhole principle.
 Inclusionexclusion principle: Page 2, the second line after
"Now," had signs reversed for two of the terms.
 Assignment 4 solutions: In question 4, the equal signs were not
properly aligned.
 Assignment 5 solutions: In question 2d), 36 should be 39.
 Notes on combinations with repetitions: n+k1
choose n=n+k1 choose k1 should be n+k1
choose n1=n+k1 choose k. The appendix already
contained the correct formula.

