Thread: What would the world population be reduced to if only 9s and 10s were left?

6 million?

Each number ranking is a standard deviation starting from 5.

4 standard deviations = 99.9% so 0.1% of the population is a 1- or a 9+.

Divide by 2 to eliminate the 1-'s and you get 0.05% of the population are 9+.

Global population is 8 billion so 0.0005x8,000,000,000 = 4 million people remaining.