8% of people have blue eyes
2% of people have blond hair - blonds usually have blue eyes we can say that 1,5% of the have blue eyes
8%-1,5%=6,5%
but 2% of people are redheads
redheads have brown, blue, green eyes
we can suppose that 0,5-1% of redheads have blue eyes
6,5%-0,5/1%=5,5/6%
5,5-6% of people in the world have brown hair and blue eyes
2% of people have blond hair - blonds usually have blue eyes we can say that 1,5% of the have blue eyes
8%-1,5%=6,5%
but 2% of people are redheads
redheads have brown, blue, green eyes
we can suppose that 0,5-1% of redheads have blue eyes
6,5%-0,5/1%=5,5/6%
5,5-6% of people in the world have brown hair and blue eyes