216 countries will participate in 2012 Olympics.....
4,000,000 atletes and 4,000 countries will participate
27 countries and 74 athletes participate in the Modern Pentathlon.
71 Countries will participate in the 19th commonwealth games.
The International Space Station (ISS) cost approximately $150 billion to build and operate over its lifetime. This includes contributions from multiple countries that participate in the ISS program.
Sixteen countries shall participate in the UEFA Euro 2016 tournament.
12
76
204 countries
Currently, there are 7 people aboard the International Space Station (ISS). They are from the United States, Russia, and Japan.
Biggest advantage to have a joint collaboration on such a big project is that it reduces the cost. Scientists from different countries can share their expertise well if they all get together on one project. ISS is been working efficiently and finding many insights of what was not understood before.
I believe it was 11 countries...