Practical Mathematics for Grade 10, Problem ID: 4837

Practical Mathematics K10There were 196 countries on the Earth in 2010.

The 2-letter codes are supplied by the ISO ( International Organization for Standardization) for each country. For example,
US - United States,
GB - United Kingdom,
AU - Australia,
. . . 

How many more new countries can get a 2-letter code?

About 580About 480About 280About 380