What summit was to be attended by the representatives of 3% of the world's area, 21% of the world's population and 3.8% of the global economy, as of 2015?
South Asian Association for Regional Cooperation:  SAARC comprises 3% of the world's area, 21% of the world's population and 3.8% (US$ 2.9 trillion) of the global economy, as of 2015.
i don't know