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Let n1<n2<n3<n4<n5 be positive integers such that n1+n2+n3+n4+n5=20. Then the number of such distinct arrangements (n1,n2,n3,n4,n5) is ___

Answer» Let n1<n2<n3<n4<n5 be positive integers such that n1+n2+n3+n4+n5=20. Then the number of such distinct arrangements (n1,n2,n3,n4,n5) is ___


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