56 people sign up for karaoke contest at a local nightclub.

56 people sign up for karaoke contest at a local nightclub. Of them, 19 sang in a band, chorus, or choir while in high school and 37 did not. Suppose 1 contestant is chosen at random. Consider the following two events: The selected contestant sang in a band, chorus, or a choir while in high school and selected contestant did not sing in a band, chorus, or choir while in high school. If you are to find the probabilities of these 2 events, would you classical or frequency approach? why?