Jillian surveyed students at her school and found out the following probabilities: P ( freshman ) = 0.30 P ( plays instrument )
= 0.20 P ( freshman and instrument ) = 0.10 P(freshman)=0.30 P(plays instrument)=0.20 P(freshman and instrument)=0.10 Find the probability that a student plays an instrument given they are a freshman. P ( plays instrument ∣ freshman ) =
