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The value of "^20 C0+^(20)C1+^(20)C2+^(2...

The value of `"^20 C_0+^(20)C_1+^(20)C_2+^(20)C_3+^(20)C_4+^(20)C_ 12+^(20)C_ 13+^(20)C_14+^(20)C_15` is a. `2^(19)-(( "^(20)C_10 + "^(20)C_9))/2` b. `2^(19)-((^(20)C 10+2xx^(20)C9))/2` c. `2^(19)-(^(20)C 10)/2` d. none of these

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