Решение задачи N1852 теория вероятностей

1852. The probability that at one measurement of a certain physical quantity an error exceeding the given accuracy will be made equal to 0.2. Three independent measurements were made. Find the probability that, in no more than one dimension, the error committed exceeds the specified accuracy.

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