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9. The blood groups of 30 students of Class VIII are recoded 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.


Blood group                      frequency
A                                          9
B                                          6
O                                         12
AB                                        3
0 0 0
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