Solution of problem N4256 Bernoulli probability theory

Solution of problem N4256 Bernoulli probability theory

4256. It is known that 70% of a large consignment of goods in identical packages is first-class goods. Find the most probable number of units of the first grade product among the six units selected at random from the total mass, and calculate the probability corresponding to this event.

Additional information:

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