An Exclusion Question
85396
Plotting discontinuous functions without spurious vertical segments
31058
Responding to a poor question
131592
Finite choice without AC
115560
Exclusion in formation of comparative statements
108941
Combinatorics Question Asking How Many Integer Solutions Given Different Restrictions
132129
Derivation of derangement with inclusion-exclusion
70143
Mutually exclusive countable subsets of a countable set
105244
Use inclusion-exclusion to find explicit formula for $P(A_k)$. Where is independence used?
28796
Use the Inclusion-Exclusion Principle to show that for any non-negative integers $m, r, n$ such that $m≤r≤n$...
14734
Another "which" question
72185
The negation of a limit condition, Spivak style.
66948
Proving question on sets
12116
Two Answers, One Question
118069
Here's -- Plurality Question
73069
A riddle (in C)
40439
about a difficult and weird Probability question
102136
How many subsets contain no consecutive elements?