Question: please provide explanation on the question A class wrote two Mathematics tests. 82% of the class passed both tests and 94% of the class passed

please provide explanation on the question

A class wrote two Mathematics tests. 82% of the class passed both tests and 94% of the class passed the rst test. A student is chosen at random from this class. What is the probability that the student passed the second test given that the student passed the rst test

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