Five different books (A, B, C, D and E) are to be arranged on a shelf. Books A , B ,C and D ARE to be arranged first and second starting from the right of the shelf. The number of different orders in which books E may be arranged is  Pick one:	A) 5!	B) 6!	C) 8!	D) 1!	E) 12!
Solution   Since books A, B,C and D is arranged first and second, only book E will change order. Therefore it an arrangement problem involving 1 items and the number of different order is given by   1!   Answer 1!
<result>D</result>
Five different books (A, B, C, D and E) are to be arranged on a shelf. Books A , B ,C and D ARE to be arranged first and second starting from the right of the shelf. The number of different orders in which books E may be arranged is