Answer
$P = \frac{3}{5}$
Work Step by Step
"is a female or has green eyes" = selecting a student that is a female with any eye color OR is either a male/female with green eyes.
Let $P = $ probability of selecting a student that is a female or has green eyes
$P = \frac{(number of females)+(number of male/females with green eyes)}{100}$
$= \frac{(18+20+12)+(10)}{100}$ (Notice we didn't count 12 females with green eyes as you only consider them ONE time in the brackets "number of females")
$= \frac{50+10}{100}$
$= \frac{60}{100}$
$= \frac{3}{5}$
