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A boy has 3 library tickets and 8 books of his interest in the library. Of these 8, he does not want to borrow Chemistry part II, unless Chemistry Part I is also borrowed. In how many ways can be choose the three books to be borrowed?

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To solve the problem, we need to consider the restrictions on borrowing Chemistry Part II. Let's denote the books as follows: - Let \( C_1 \) = Chemistry Part I - Let \( C_2 \) = Chemistry Part II - Let \( B_1, B_2, B_3, B_4, B_5, B_6 \) = the other 6 books We have a total of 8 books: \( C_1, C_2, B_1, B_2, B_3, B_4, B_5, B_6 \). ...
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