Решение задачи N1025 теория вероятностей Лапласа

1025. According to the TV company, it is established that 10% of the picture tubes fail during the warranty period. What is the likelihood that of the 64 randomly chosen kinescopes will work the warranty period:
a) exactly 60 picture tubes,
b) from 54 to 63 picture tubes?

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