Stack Overflow -------------- Questions Accepted >= 1 answers Closed (Ex Deleted) 10386638 5819260 9148900 443261 Here, 56% of questions have an accepted answer and 88% have 1 or more answer (i.e. 12% have no answers). 4% are closed. <%%> Ask Ubuntu ---------- Questions Accepted >= 1 answers Closed (Ex Deleted) 204114 69534 162546 27566 Here 34% of questions have an accepted answer and 80% have one or more answer (i.e. 20% have no answers). 14% are closed. <%%> Unix and Linux -------------- Questions Accepted >= 1 answers Closed 75899 38258 64049 4988 Here 50% of questions have an accepted answer and 84% have one or more answer (i.e. 16% have no answers). 7% are closed.