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[" a) "0],[" The number of ways in which...

[" a) "0],[" The number of ways in which a host lady invite "8" people for a party of "8" out of "12" people of "],[" whom two do not want to attend the party together is "],[[" a) "2x^(11)C_(7)+^(10)C_(8),b)^(11)C_(7)+^(10)C_(x)," c) "^(12)C_(8)-^(10)C_(6)," d) "2!^(10)C_(6)]]

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