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Find n and r If (nPr) = (nP(r+1)) and (nCr = nC(r-1)). (Doubtnut) View |
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Find n and r if `.^(n)P (r)=.^(n)P (r+1)and^(n)C (r)=^(n)C (r-1)`. (Doubtnut) View |
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Using nCr to get the n,r formula (Graham Lewis) View |
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If nP^r = nP^r+1 and nC^r=nC^r-1, then the value of r is equal to (Amardev Singh Math Square) View |
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If `.^(n)P (r)=.^(n)P (r+1) and .^(n)C (r)=.^(n)C (r-1)`, find n and r. (Doubtnut) View |
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If ^nC r:^nC r+1=1: 2 and ^nC r+1:^nC r+2=2: 3, find the values of ' n ' and ' r '. (PW Solutions) View |
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Find n and r if `.^(n)C (r):^(n)C (r+1):^(n)C (r+2)=1:2:3`. (Doubtnut) View |
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If `.^(n)P (r)=504and.^(n)C (r)=84` find n and r. (Doubtnut) View |
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Combination and Permutation (Rahr Math) View |
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nPr=n-1Pr+r.(n-1)Pr-1 Ex 7.2 class 11| Mathematics|Permutation (Math Academy) View |