Median(Md)=68,5+(40-25)/(19)cdot 9=

The formula provided calculates a value within a dataset using interpolation. It's a method to estimate the median when it falls between two data points. Let's break down the calculation:* **68.5:** This is likely the midpoint between two data values in the dataset.* **40 - 25:** This represents the difference between a cumulative frequency (40) and a specific frequency (25) – likely the cumulative frequency up to the data point below the median.* **19:** This is likely the frequency of the class interval containing the median.* **9:** This is likely the class width (the range of values within the interval).The fraction determines the proportional distance between the lower boundary of the interval containing the median and the actual median. This proportion is then multiplied by the class width (9) to adjust the midpoint (68.5) to find the estimated median.Therefore, the calculation provides an **interpolated median**. Without the full dataset and frequency distribution, we cannot calculate the precise numerical answer. The expression itself is correct for calculating an interpolated median.