Construct a frequency distribution for the given qualitative data.The blood types for 40 people who agreed to participate in a medical study were as follows.
Construct a frequency distribution for the data.
A. 
| O | 20 |
| A | 13 |
| B | 4 |
| AB | 3 |
B.
| O | 18 |
| A | 14 |
| B | 5 |
| AB | 3 |
C.
| O | 19 |
| A | 11 |
| B | 5 |
| AB | 2 |
D.
| O | 19 |
| A | 13 |
| B | 5 |
| AB | 3 |
Answer: D
Mathematics
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