A test for a disease is 90% accurate. If 2% population has disease, probability that a randomly chosen person tests positive is:
A test for a disease is 90% accurate. If 2% population has disease, probability that a randomly chosen person tests positive is:
- A. 0.116
- B. 0.098
- C. 0.902
- D. 0.020
Answer: A) 0.116
Explanation: 0.02×0.9+0.98×0.1=0.116.
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