Use the data in the following table, which summarizes blood groups and Rh types

Question

Use the data in the following table, which summarizes blood groups and Rh types for randomly selected subjects. Assume that subjects are randomly selected from those included in the table. If one person is selected, find the probability of getting someone who is Group A or type Rh^+. Are the events of selecting someone who is Group A and the event of someone who is type Rh^+ disjoint events? The probability of getting someone who is Group A or type Rh^+ is (Type an integer or a simplified fraction.)

Explanation / Answer

Total frequency = 59 + 46 + 28 + 11 + 20 + 12 + 6 + 3 = 185

Frequency for Type A or Rh+ = 46 + 20 + 12 + 6 + 3 = 87

Therefore the required probability would be computed as:

= 87/185

= 0.4703

Therefore 0.4703 is the required probability here.

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