In an entrance test with 180 questions, there are three sections: Physics (40 questions), Chemistry (70 questions), and Biology (70 questions). A student answered 75% of Physics, 55% of Chemistry, and 45% of Biology questions correctly. If the minimum passing score is 62%, how many more questions did the student need to answer correctly to pass?

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Accepted Answer

1. Compute correct answers:

- Physics: $40	imes0.75=30$.
   - Chemistry: $70	imes0.55=38.5$.
   - Biology: $70	imes0.45=31.5$.

2. Total correct now: $30+38.5+31.5=100$.

3. Passing mark: $62\%$ of $180$ is $0.62	imes180=111.6$.

4. Extra needed: $111.6-100=11.6$. So choice **(c)** is correct.

FINAL_ANSWER: c

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