How many ways can 5 distinct books be arranged on a shelf if 2 specific books must stand next to each other?

1. Identify what is being asked: this is a **Permutations And Combinations** question. 2. Apply the standard approach for this question type to evaluate each option. 3. The correct answer is **C. 48** — it satisfies the conditions of the stem. _Source: GMAC Official 12 Sample Questions (mba.com)_