All human blood can be typed as O, A, B or AB and the frequency of these occurrences can be found in the table below: Blood Type O A B AB Probability 0.42 0.30 0.05 0.23   Which blood type occurs most frequently?  If a person was selected at random, which blood type are they least likely to have?

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All human blood can be typed as O, A, B or AB and the frequency of these occurrences can be found in the table below:

Blood Type

O

A

B

AB

Probability

0.42

0.30

0.05

0.23

 

  1. Which blood type occurs most frequently? 
  2. If a person was selected at random, which blood type are they least likely to have? 
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