If Corina had added the numbers P and Q correctly, the answer would have been 16. By mistake, she subtracted Q from P. Her answer was 4. What is the value of P?
(A) 4 (B) 5 (C) 8 (D) 10 (E) 16
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Source: CEMC, University of Waterloo,
licensed CC-BY-NC-4.0.
Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.