 
<translate> Nwa akwụkwọ: A na-etinye akwụkwọ iri n'elu shelf. Ikekwe akwụkwọ abụọ ga-anọkọ ọnụ mgbe niile bụ? Nhọrọ: (A) 1/6 (B) 1/7 (C) 1/5 (D) 1/9 (E) Nke abụọ. Nwa akwụkwọ ọzọ: Ka anyị kwuo, hmmm... <eng> Student: 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) 1/7
(C) 1/5
(D) 1/9
(E) 1/2.
Another student: Let's say, hmmm...
 