Решение задачи N1556 теория вероятностей Лапласа

1556. A check of the quality of the watches made at the plant established that on average 70% of them meet the requirements, and 30% need additional adjustment. The receiver checks the quality of 300 manufactured watches. If at the same time 12 or more hours are found among them, requiring additional adjustment, the whole lot is returned to the plant for finalization. Find the probability that the party will be accepted.

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