Solution of problem N2323 Laplace probability theory

Solution of problem N2323 Laplace probability theory

2323. Plant varietal seeds produces hybrid seeds of corn. It is known that seeds of the 1st grade are 90%. To find:
1) The probability that, of the 3600 seeds taken at random, the number of seeds of the first grade will be from 3195 to 3213.
2) The most probable number of seeds of the first grade from 3600 seeds taken for inspection.

Additional information:

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