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Problem 59

Combinatorics Difficulty 1.0 Find the answer UKMT Pink Kangaroo · United Kingdom · 2015

Petra has three different dictionaries and two different novels on a shelf. How many ways are there to arrange the books if she wants to keep the dictionaries together and the novels together?

(A) $12$ (B) $24$ (C) $30$ (D) $60$ (E) $120$

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