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 Find Combinations without repetition of {a, b, c, d} [ Calculator, Method and examples ]Solution:Your problem -> Combinations without repetition of {a, b, c, d}n=4,r=4,"List variables"=a, b, c, dCombination without repetition : Formula  = (n!) / (r! (n-r)!) = (4!) / (4! * (4-4)!)= (4!) / (4! * 0!) = 1List are (total = 1) : {a, b, c, d}

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