Calculate the mean deviation from the mean of the distribution below

To calculate the mean deviation from the mean, we'll use the formula provided: $MD = \frac{\sum f|x - \bar{x}|}{\sum f}$.
First, we need to find the class mark ($x$) for each class, then calculate the mean ($\bar{x}$), and finally apply the mean deviation formula.

Assumption: For the class "10-10", we will take the class mark ($x$) as 10. For the other classes, the class mark is the midpoint of the interval.

Here's a table with the necessary calculations: | Class | Freq (f) | Class Mark (x) | $fx$ | $|x - \bar{x}|$ | $f|x - \bar{x}|$ | | :------ | :------- | :------------- | :----- | :-------------- | :--------------- | | 10-10 | 12 | 10 | 120 | 19.32 | 231.84 | | 10-20 | 25 | 15 | 375 | 14.32 | 358.00 | | 20-30 | 32 | 25 | 800 | 4.32 | 138.24 | | 30-40 | 25 | 35 | 875 | 5.68 | 142.00 | | 40-50 | 21 | 45 | 945 | 15.68 | 329.28 | | 50-60 | 10 | 55 | 550 | 25.68 | 256.80 | | Total | $\sum f = 125$ | | $\sum fx = 3665$ | | $\sum f|x - \bar{x}| = 1456.16$ |