While Ivy League institutions like Harvard, Yale and Columbia are notoriously exclusive and difficult to get into, once students are accepted, it's actually quite difficult to flunk out.
According to a study conducted by Stuart Rojstaczer and Christopher Healy, and published in the prestigious Teachers College Record, about 43 percent of all college grades are A's, and about three-fourths of all grades are A's or B's.
Their report explains that historically, the universal curve applied to college grades: A's were about 10 percent of all grades; B's were about 20 percent; C's were about 40 percent; D's were about 20 percent; and F's were about 10 percent. And according to Drs. Rojstaczer and Healy report, in 1940 only about 15% of all grades were A's.
Click here to see more data on trends in grade inflation in the U.S.
Exploring this trend, Business Insider recently came up with a list of the top 13 schools in the U.S. where it's impossible to fail. Despite their selectivity, many of these schools have extremely high grade inflation and lenient grading systems - some have even eliminated grades all together!
Below is a list of top 13 colleges where it's hardest to fail - click here to reach the full article from Business Insider.