Решение задачи N3745 теория вероятностей Байеса

3745. 30% of all parts come to the assembly from the first machine, 70% from the second. The probability of marriage is 20% at the first machine, and 10% at the second. Taken at random item was standard. What is the probability that it is made on the second machine?

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