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If (n 1)C(r 1) : nCr : (n-1)C(r-1) = 11:6:3, find the value of n and r| Combination | Best Tutorial
R 1 N C R Mp3 & Mp4
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nCr=(n/r)(n-1)C(r-1) || nCr=(n/r)(n-1)C(r-1) || prove that: nCr=(n/r)(n-1)C(r-1)
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Prove n-1Cr n-1Cr-1=nCr | Combination | Statistics Tutor
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If nCr nC(r 1)=(n 1)Cx then x =
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Proof of ncr nc(r-1)=(n 1)c(r)
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Combinations | Theorem | To prove that nCr nCr-1= n 1Cr
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Example 1 on nCr
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Binomial Coefficient: Properties Lecture 4 : nCr=nCn-r,nCr-1 nCr = n 1Cr,nCr/nCr-1 = (n-r 1)/r
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If nCr denotes the number of combinations of n things taken r at a time , then the expression
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If an= summation 1/nCr then summation r/nCr is equal to (a)(n-1)an (b)nan (c)1/2nan (d)NOT | BT PYQ🔥