




'''simple docstring'''







import math

A									=10
A									=7
A									=BALLS_PER_COLOUR * NUM_COLOURS





def 		snake_case_							(_a			:							int = 2_0  ):
    UpperCAmelCase     =	math.comb(_a					,     _a  )
    UpperCAmelCase     =	math.comb(NUM_BALLS - BALLS_PER_COLOUR					,     _a  )

    UpperCAmelCase     =	NUM_COLOURS * (1 - missing_colour / total)

    return F"{result:.9f}"


if __name__ == "__main__":
   print(solution(20))










'''simple docstring'''







from .configuration_bert_masked import MaskedBertConfig
from .modeling_bert_masked import (
    MaskedBertForMultipleChoice,
    MaskedBertForQuestionAnswering,
    MaskedBertForSequenceClassification,
    MaskedBertForTokenClassification,
    MaskedBertModel,
)
from .modules import *




