Solution of problem N1896 Bernoulli probability theory

Solution of problem N1896 Bernoulli probability theory

1896. The packer places 9 instruments, checked by the OTC or manufactured by workers who have a personal stamp. The probability that the device is marked with a personal brand is 0.75. What is the probability that the devices tested by the TCI will turn out to be: a) at least two; b) 2?

Additional information:

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

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