To calculate the mean and standard deviation from the given frequency distribution, we will use the following formulas:

To calculate the mean and standard deviation from the given frequency distribution, we will use the following formulas:
Mean ($\bar{x}$) $\bar{x} = \frac{\sum fx}{\sum f}$
Standard Deviation ($\sigma$) $\sigma = \sqrt{\frac{\sum fx^2}{\sum f} - \left(\frac{\sum fx}{\sum f}\right)^2}$
First, let's create a table to organize the calculations for $fx$ and $fx^2$.
The total number of students is $\sum f = 50$.

From the table, we have:
$\sum f = 50$
$\sum fx = 365$
$\sum fx^2 = 2873$