The mean marks of the following distribution is:

Marks Obtained	No. of Students
36	12
35	11
93	18
17	5

To find the mean marks of the given distribution, we use the formula for the weighted mean (or arithmetic mean of a grouped frequency distribution):

$\text{Mean}=\frac{\sum (f_i}{\sum f_i}$

where $x_i$ represents the marks obtained, and $f_i$ represents the number of students (frequency) for each mark.

Step 1: Calculate the total number of students ($\sum f$)
Sum the frequencies in the "No. of Students" column:
$\sum f=12+11+18+5=46$

Step 2: Calculate the sum of the product of marks and number of students ($\sum (f·x)$)
Multiply each mark by its corresponding number of students and add the results:
$(36·12)=432$
$(35·11)=385$
$(93·18)=1674$
$(17·5)=85$

Now, sum these products:
$\sum (f·x)=432+385+1674+85=2576$

Step 3: Calculate the mean
Divide the sum of the products by the total number of students:
$\text{Mean}=\frac{2576}{46}=56$

Therefore, the mean marks of the distribution is 56.