Solution of problem N1542 Laplace probability theory

Solution of problem N1542 Laplace probability theory

1542. The shop has 80 machines working independently of each other. For each machine, the probability of being switched on is 0.9. Calculate the probability that at some point in time a) there will be exactly 50 machines; b) from 60 to 75 machines.

Additional information:

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

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