The 2012 NCAA men's basketball tournament included teams from 31 states and the District of Columbia.
There were no schools from New Jersey represented in the 2012 NCAA men's basketball tournament.
North Carolina has 5, followed by New York, California, Kentucky, and Ohio at 4.
North Carolina sent 5 teams to the 2012 NCAA Mens Basketball Tournament. NC State, UNC, Duke, Davidson, and UNC Asheville. I'm pretty sure this was the more than any other state. Virginia had a good showing as well. I'm not sure if Georgetown is in Virginia or Washington D.C.
Wichita State is in the Missouri Valley Conference. They were listed as being in the South Regional in the 2012 NCAA tournament.
In 2012, there are (or were) four teams in the NCAA tournament: Duke, Florida State, North Carolina and North Carolina State. That is 4/68 or 5.9% of the tournament. Actually, in 2011, the seven teams that were in the NCAA tournament were: Virginia, North Carolina, Duke, Georgia Tech, Maryland, Boston College and Virginia Tech. That constituted 7/65 of the entire NCAA tournament or 10.8%
If "this year" is 2013, then the answer is that 62% of the 50 states were represented by teams in the NCAA men's basketball tournament. That also happens to be the samepercentage as 2012.
In 2012, there will be twelve teams for men's basketball in the olympics. There will be twelve women's teams in the 2012 olympics, all competing for the gold medal.
This year, the 2012 NCAA Tournament has four teams from Ohio in the Sweet 16: The Ohio State University (Go Bucks!), Ohio, Cincinnati, and Xavier.