The mean of the below-given data is ________.

Marks obtained (xi)	Number of students (fi)
10	2
25	4
38	4
49	4
50	5
69	8
75	3
80	5

Let us analyze the data:

The formula of mean = $\overline{\mathrm{x}}=\frac{\sum {\mathrm{f}}_{\mathrm{i}}{\mathrm{x}}_{\mathrm{i}}}{\sum {\mathrm{f}}_{\mathrm{i}}}$

Hence, 

$$\begin{gathered} \overline{\mathrm{x}}=\frac{1895}{35} \\ = 54.14 \end{gathered}$$

Therefore, the mean of the grouped data is 54.14.