What is the reason for 7 and 11 getting rejected at a Korean university?

In Korea, the numbers 7 and 11 are considered unlucky because they are associated with death and bad luck. In Korean culture, the number 7 is often associated with ghosts and spirits, while the number 11 is seen as a symbol of betrayal and deceit. As a result, some universities in Korea may reject applications from students with these numbers in their birthdates or other personal information. This superstition is taken seriously in Korean society, and some people may go to great lengths to avoid these numbers in their daily lives.