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All copies are books (A) + No book is a pen (E) = No copy is a pen `=>` Conversion`=>` No pen is as copy (E)`=>` I.I`=>` Some pens are not copies(O).Hence, Conclusion I will follow. All copies are books (A)`=>` I.I`=>` Some copies are books(I). All copies are books(A) + All books are telephones(A) = All copies are telephones(A). Hence, neither conclusion II nor III follows. All copies are books (A) + All books are telephones (A)= All copies are telephones (A) + No telephone is a radio (E) = No copy is radio(E)`=>` I.I`=>` Some copies are not radios (O). Hence, conclusion IV will follow.
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Find the cost price of the digital watch for the shopkeeper if he initially marked it at 80% above the cost price and later offered two successive disco...