1928. Three sets of materials must be supplied from the construction of three different suppliers. It is known that the first supplier delivers materials on time in an average of 82% of all cases, the second - in 85%, the third - in 78%. Find the probability that at least one of the three parties will be delivered to the construction site in a timely manner.

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