

from abc import ABC, abstractmethod
from argparse import ArgumentParser

class 					a__						(					snake_case			):
			"""simple docstring"""







			@staticmethod
			@abstractmethod
			def      UpperCamelCase		(    lowercase       )  ->						Any:
							'''simple docstring'''






							raise NotImplementedError()


			@abstractmethod
			def      UpperCamelCase		(    self       )  ->						Dict:
							'''simple docstring'''






							raise NotImplementedError()




import math

lowerCAmelCase__	   = 1_0
lowerCAmelCase__	   = 7
lowerCAmelCase__	   = BALLS_PER_COLOUR * NUM_COLOURS



def 					lowerCAmelCase__							(	SCREAMING_SNAKE_CASE_:							int = 2_0      )			->      str:




				'''simple docstring'''





				A__        =			math.comb(SCREAMING_SNAKE_CASE_	,       SCREAMING_SNAKE_CASE_      )
				A__        =			math.comb(NUM_BALLS - BALLS_PER_COLOUR	,       SCREAMING_SNAKE_CASE_      )

				A__        =			NUM_COLOURS * (1 - missing_colour / total)

				return F'{result:.9f}'


if __name__ == "__main__":
	print(solution(2_0))

