Решение задачи N3948 теория вероятностей Байеса

3948. An average of 40% of hours with defect A, 25% with defect B and 35% with defect C arrive at the watch workshop. The probability of repairing hours with defect A is 0.5, with defect B – 0.6, and defect C –– 0.7. Find the probability that a fully repaired watch had a defect A.

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)