Решение задачи N1011 теория вероятностей Лапласа

1011. When hiring candidates, a test is proposed containing 150 questions with three options for each answer, with only one of the answers correct. To successfully pass the test, it is necessary to correctly answer at least 55 questions. What is the probability of getting a job, choosing answers at random?

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