Answer:
2 / 9
Step-by-step explanation:
P(Freshman| Girl) = P(Freshman n Girl) / P(Girl)
P(Freshman n Girl) = n(Freshman n Girl) / n(total)
P(Freshman n Girl) = 4 / 30 = 0.1333
P(girl) = n(girl) / n(total)
P(Girl) = 18/30
Hence,
P(Freshman n Girl) = 4/30 ÷ 18/30
P(Freshman n Girl) = 4/30 * 30/ 18
P(Freshman n Girl) = 4 /18 = 2 / 9
