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Krishna
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#maths permutation and combination, important formula
maths - Combination Permutation Selection Arrangement n! nl nPr nCr 'ಕ (n_1) r! (n - r)! nPn nCn =1 nl س 100 . nCo =1 =1 nPn nPn-1 nCn-r nCr ೆಕ n-1Cr-1 n-1Pr-1 n n0r "Cr X =n X "ಕ n-18-1 n+1Cr n-1Pr . م8< nCr nCr-1= +rx + ೆಕ nRr nCr Xrl ೆಕ Combination Permutation Selection Arrangement n! nl nPr nCr 'ಕ (n_1) r! (n - r)! nPn nCn =1 nl س 100 . nCo =1 =1 nPn nPn-1 nCn-r nCr ೆಕ n-1Cr-1 n-1Pr-1 n n0r "Cr X =n X "ಕ n-18-1 n+1Cr n-1Pr . م8< nCr nCr-1= +rx + ೆಕ nRr nCr Xrl ೆಕ - ShareChat