Решение задачи N7 теория вероятностей Чебышева

7. The probability of occurrence of event A in each trial is 1/2. Using Chebyshev´s inequality, estimate the probability that the number X of occurrences of event A will be between 40 and 60 if 100 independent tests are performed.

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