4. [Maximum mark: 5] In a class of 24 students, 12 study French, 8 study Spanish, and 8 do not study either of these subjects. The value p represents a certain number of students. U study French 8 12 8 P study Spanish It is known that P(F' n S') = 3. (a) Write down the value of p. (b) Find the probability that a student studies Spanish given they study French. [

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