RosettaCodeData/Task/Evaluate-binomial-coefficients/Clojure/evaluate-binomial-coefficients.clj

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Clojure
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2013-04-10 16:57:12 -07:00
(defn binomial-coefficient [n k]
(let [rprod (fn [a b] (reduce * (range a (inc b))))]
(/ (rprod (- n k -1) n) (rprod 1 k))))