 
 <translate> 10 books are placed at random in a shelf. The probability that a pair of books will always be together is
Options:
(A) 1/6
(B) 1/9
(C) 1/5
(D) 1/6
(E) 1/3 OK. Let's think. Some random thoughts first: <ibo> A na-etinye akwụkwọ iri n'ahịrị n'ahịrị n'elu shelf. Ikekwe akwụkwọ abụọ ga-anọkọ ọnụ mgbe niile bụ Nhọrọ: (A) 1/6 (B) 1/9 (C) 1/5 (D) 1/6 (E) 1/3 OK. Ka anyị chee echiche. Echiche ụfọdụ na-enweghị isi mbụ: 