Question

You have a face-to-face statistics class in the traditional classroom setting. There are 25 males and 45 females enrolled. You’re the instructor so you like to arrive in the classroom before the first students arrive. What is the probability that the first student who arrives is a female? Round to the nearest tenth or hundredths place.

Answer 1

As in your previous question, if we assume random arrival, all students have equal probability of arriving first.
The probability of a female student arriving first is given by
#of favourable outcomes ÷ total # of possible events.