Data task 15: A health-service planning team needs a rapid, accurate calculation from the stated data. The setting is a diagnostic unit. A sample contains 3 compliant and 18 non-compliant records. One is chosen at random. What is the probability it is compliant?

Data task 15: A health-service planning team needs a rapid, accurate calculation from the stated data. The setting is a diagnostic unit. A sample contains 3 compliant and 18 non-compliant records. One is chosen at random. What is the probability it is compliant?

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