1. **Problem:** Which of the following is correct about the relative frequency? 2. **Understanding the problem:** Relative frequency is the fraction or proportion of the total number of data points that fall within a particular class or category. 3. **Formula:** Relative frequency = \frac{Frequency of a class}{Total frequency} 4. **Explanation:** It represents the proportion of the total frequency that belongs to a specific class. 5. **Options:** - Option-A: Proportion of frequency - Option-B: Proportion of total frequency - Option-C: Proportion of class interval - Option-D: None of the above 6. **Analysis:** The correct definition of relative frequency is the proportion of the total frequency, which matches Option-B. 7. **Final answer:** Option-B: Proportion of total frequency