Answer:
3/4
Explanation:
probability of any event =
3 freshmen + 3 sophomores + 3 juniors + 3 seniors = 12 participants
∴the total number of participants = 12
P(freshman is a captain) =
=
=
P (freshman is not a captain) = 1 -
=
whenever the probability of an event not happening is being calculated, always subtract the possibility of the occurrence of such event from 1