Question: A class has 30 students. the students answer a poll about whether they like cats or dogs. The total number of students in each category

A class has 30 students. the students answer a poll about whether they like cats or dogs. The total number of students in each category is given in the table below:

Pet Preferences:

Like cats = 15

Like dogs = 20

Like both = 9

Like neither = 4

What is the probability that a randomly chosen student in this class like cats, given that they like dogs?

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