Решение задачи N1728 теория вероятностей Пуассона

1728. In the regional olympiad in mathematics n = 120 students take part. The probability that each applicant will answer all questions of the Olympiad is p = 0.02. What is the probability that exactly 3 students will pass this stage of the Olympiad, answering all the questions?

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