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[" If "sum(i=0)^(25){^(oo)C(1),^(50-r)C(...

[" If "sum_(i=0)^(25){^(oo)C_(1),^(50-r)C_(23-r)}=K(^(80)C_(2s))," then "K" is equal to : "],[" [JEE(Main) "-2019}]

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