combin

Library "combin"

Description:
The combin function is a the combination function
as it calculates the number of possible combinations for two given numbers.
This function takes two arguments: the number and the number_chosen.
For example, if the number is 5 and the number chosen is 1,
there are 5 combinations, giving 5 as a result.

Reference:
https://ideone.com/aDJXNO
https://support.microsoft.com/en-us/office/combin-function-12a3f276-0a21-423a-8de6-06990aaf638a

combin(n, kin)
  Returns the number of combinations for a given number of items. Use to determine the total possible number of groups for a given number of items.
  Parameters:
    n: int, The number of items.
    kin: int, The number of items in each combination.
  Returns: int.