" 2.Find "n" and "r" if "^(n)P(r)=336" a...

" 2.Find "n" and "r" if "^(n)P_(r)=336" and "^(n)C_(r)=56

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Find n and r if .^(n)P_(r)=.^(n)P_(r+1)and^(n)C_(r)=^(n)C_(r-1) .

Find the values of n and r if ""^nP_r=336,""^nC_r=56 .

IF ""^(n)P_(r)=840,""^(n)C_(r)=35 then n=

Find x if ^(n)P_r = x ^(n)C_r

If ""^(n)P_r = ""^(n)P_(r-1) and ""^(n)C_(r) = ""^(n)C_(r-1) , find the values of n and r.

If ""^(n)P_(r) = ""^(n)P_(r+1) and ""^(n)C_(r) = ""^(n) C_(r-1) then the value of r is equal to

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