Mathematics, 30.04.2021 14:00, vale343

The medical records for a class of 30 children showed whether they had previously had measles or mumps. The records showed 24 had had measles, 12 had had measles and mumps, and 26 had had measles or mumps. If one child from the class is selected randomly from the group, determine the probability that he/she has had: mumps
Mumps but not measles
Neither mumps nor measles

Answers: 3

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The medical records for a class of 30 children showed whether they had previously had measles or mum...