2320. Plant varietal seeds produces hybrid seeds of corn. It is known that seeds of the 1st grade are 90%. Find: 1) The probability that of the seeds taken at random for testing n = 10000 seeds, the number of seeds of the first grade will be from 8970 to 9045. 2) The most probable number of seeds of the first grade from the n = 10,000 seeds taken for verification.

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