Calculate probability a student likes physics or chemistry.
\( \begin{array}{l}\textbf{In a class of 120 students, 45 like physics,} \\ \textbf{55 like chemistry, and 30 like both. What is the} \\ \textbf{probability that a student likes either physics or chemistry?}\end{array} \)
Choose one option:
Add counts, subtract overlap, divide by total students.
Use inclusion-exclusion to avoid double-counting students who like both subjects.
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