In a certain group of students, the probability of a randomly-chosen student being male is 40%, the probability of the student studying Spanish is 18%, and the
probability of the student being a male who studies Spanish is 5%. What's the
probability of the student being a male, if you know the student studies Spanish?
a) 7.2%
b) 12.5%
c) 8%
d) About 27.8%