Solution:
â—Ź The G20 comprises 19 countries and the European Union .
â—Ź The 19 countries are Argentina, Australia, Brazil, Canada, China, Germany, France, India , Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, the United Kingdom and the United States.
â—Ź The G20 is the premier forum for international economic cooperation.
â—Ź Saudi Arabia hosted the 2020 G20 summit.
â—Ź It is headquartered at Mexico.
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