Question

The blood group of 20 students of class 9 are recorded as : A,B,O,O,AB,O,A,O,B,A,AB,AB,O,O,AB,A,B,A,O,A. Then frequency of rarest blood group is ​

Answer 1

The rarest blood group is B, and it’s frequency is 3 :)

Answer 2

Answer:

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Step-by-step explanation:

B is rarest blood group it's Frequency is 3