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[" 16.If "sum(r=0)^(n-1)((^(n)C(r))/(^(n...

[" 16.If "sum_(r=0)^(n-1)((^(n)C_(r))/(^(n)C_(r)+^(n)C_(r+1)))^(3)=(4)/(5)," then in equal to "],[[" A) "4," B) "6," C) "8," D) "10]]

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