1. **State the problem:** We need to find the 90th percentile value from the given frequency distribution table. 2. **Understand the table:** The table shows cumulative percentages (c%) for intervals of x: - 20 to 24 corresponds to 60% - 25 to 29 corresponds to 90% - 30 to 34 corresponds to 100% 3. **Identify the 90th percentile:** The 90th percentile is the value below which 90% of the data falls. From the table, the 90th percentile lies at the upper boundary of the 25-29 interval. 4. **Interpretation:** Since the cumulative percentage reaches 90% exactly at the upper limit of the 25-29 interval, the 90th percentile is 29. 5. **Final answer:** $$\boxed{29}$$