Решение задачи N2663 теория вероятностей Бернулли

2663. It is known that the final death of Count Dracula requires at least three silver bullets. Van Helsing has only 7 bullets in the cage, and the probability of hitting each shot is 0.6. Find the probability of the victory of good over evil.

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