Twenty persons were given a blood test to determine their blood type. The data set is A А в В B АВ О о ов АВ В В A A A O O 0 А О АВ a. Construct a frequency distribution table on the blood type. Calculate the relative frequencies and percentages for all categories. b. Find the mode of the data, if it exists. C. How many of them do not have type O blood? d. How many percentages of them have either type A or type B blood?

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