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The blood groups of 30 students of Class VIII are recorded as follows:A,B,O,O,AB,O,A O,B,A,O,B, A,O,O,A,AB,O,A,A,O,O,AB,B,A,O,B,A,B.O.Represent this data in the form of a frequency distribution table. Which is the most common and which is the rarest, blood group among these students.
