## Precalculus (6th Edition) Blitzer

$\dfrac{60}{100}$
We see that there are a total of $100$ students in this survey and this can be our denominator. Also, there are $10$ male students with green eyes and $50$ females students. This implies that we need $60$ students total and this can be our numerator. That is, $\dfrac{60}{100}$