1.6
64 billion divided by two thousand is 32,000,000
0.0312
0.0128
0.1753
3.125
64 divided by 4 is 16.
16
16
0.3
If you mean there will be 4 billion winners from a population of 64 billion people - the odds are 16:1
16
4^6 divided by 4^3 = 4^3 4096 divided by 64 = 64