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) =
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