Solution of problem N2319 Laplace probability theory

2319. Plant varietal seeds produce hybrid seeds of corn. It is known that seeds of the 1st grade are 90%. Find: 1) The probability that out of the 6,400 seeds taken at random to check 6400 seeds, the number of seeds of the first grade will be from 5748 to 5820. 2) The most probable number of seeds of the first grade from 6400 seeds taken for inspection