Question

In a genetics class, 6

 students have GREEN eyes, 3

 students have BLUE eyes, and 11

 have HAZEL eyes. If a single student is picked at random, what is the probability that their eyes are GREEN or HAZEL?

Answer 1

probability of green eyes:

$p_g=6/(6+3+11)=3/10$

probability of hazel eyes:

$p_h=11/(6+3+11)=11/20$

probability of green or hazel eyes:

$p=3/10+11/20=17/20$