glorianight пришла и помогла решить 307-ю задачу из

Сама задача:

k defects are randomly distributed amongst n 
integrated-circuit chips produced by a factory 
(any number of defects may be found on a chip and 
each defect is independent of the other defects).

Let p(k,n) represent the probability that there 
is a chip with at least 3 defects.
For instance p(3,7) ≈ 0.0204081633.

Find p(20 000, 1 000 000) and give your answer 
rounded to 10 decimal places in the form 0.abcdefghij

Получилось решить с первой попытки.

#ioxfy 1
Вы можете выбрать до 10 файлов общим размером не более 10 МБ.