Hint for Section 6.3 Question 3

3. Let S represent the students who study statistics, C represent the students who study calculus, and L represent the students who study logic.
We must find n(S Ç C Ç L). We know that

n(S È C È L) = n(S) + n(C) + n(L) - n(S Ç C) - n(S Ç L) - n(C Ç L) + n(S Ç C Ç L).

Now substitute the information given in the problem into the above equation to find n(S Ç C Ç L).

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