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If ^100 C5+5^(100)C6+10^(100)C7+10^(100)...

If `^100 C_5+5^(100)C_6+10^(100)C_7+10^(100)C_8+5^(100)C_9+^(100)C_(10)` has the value equal to `^n C_r` , then least value of `(n+r)` is equal to 200 (2) 195 (3) 115 (4) 105

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