Assume there're 15 males and 35 females in our class. Of the 15 males, six are seniors. Of the 35 females, 13 are seniors.
Assume you randomly pick one person from our class.
A. Given that the student you choose is a senior, what is the probability of selecting a female?
B. Given that the student you choose is a senior, what is the probability of selecting a non-senior?