Answer
$P = \frac{3}{5}$
$= 0.6$ or $60$%
Work Step by Step
1. Add up the total number of students present
$= 10 + 15 + 20 + 5$
$= 25 + 25$
$= 50$
"Probability of selecting a freshman or female" = probability of selecting a freshman that is either male/female or females that is either a freshman/sophomore
Let $P = $ probability of selecting a freshman or female
$P = \frac{(10+15)+(5)}{50}$
$= \frac{25+5}{50}$
$= \frac{30}{50}$
$= \frac{3}{5}$
$= 0.6$ or $60$%
