The blood groups of `30` students are recorded as follows:
A, B, O, A, AB, O, A, O, B, A, OB, B, A, AB, B, A,AB ,B, A, A, O, A, AB, B, A, O, B, A, B, A
Prepare a frequency distribution table for the data.

Explanation

To prepare a frequency distribution table for the blood groups of 30 students, we will follow these steps:

### Step 1: List the Blood Groups
Identify the unique blood groups present in the data. The blood groups are:
- A
- B
- AB
- O
...