In 200 scans, 2 mis-scanned barcodes, what is the accuracy rate?

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Multiple Choice

In 200 scans, 2 mis-scanned barcodes, what is the accuracy rate?

Explanation:
Accuracy rate measures how often a scan is correct. With 200 scans and 2 mis-scans, there are 198 correct scans. So the accuracy is 198 divided by 200, which equals 0.99, or 99%. The 2 incorrect scans also mean an error rate of 1% (2/200), so you subtract that from 100% to get 99%. The other percentages would require more incorrect scans (98% would be 4 mis-scans, 97% would be 6 mis-scans) or no mis-scans (100%).

Accuracy rate measures how often a scan is correct. With 200 scans and 2 mis-scans, there are 198 correct scans. So the accuracy is 198 divided by 200, which equals 0.99, or 99%. The 2 incorrect scans also mean an error rate of 1% (2/200), so you subtract that from 100% to get 99%. The other percentages would require more incorrect scans (98% would be 4 mis-scans, 97% would be 6 mis-scans) or no mis-scans (100%).

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