3. a) The blood groups of 36 students of IX class are recorded as follows. A O A O A B O A B O B O B O O A B O B AB O A O O O A AB O A B O А O B Represent the data in the form of a frequency distribution table. Which is the most common and which is the rarest blood group among the students ?
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A=9
B=8
O=15
AB=2
Most common blood group is O
most rarest blood is AB
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