Two antigens, antigen A and antigen B, determine the four major human blood groups: A, B, AB, and O. The table below shows the percentage distribution of blood groups for the Caucasian population in the United States (American Red Cross, 2016). Blood group A B АВ Antigen A А, В None Distribution 40% 11% 4% 45% Calculate the probability of randomly picking a blood sample that contains only one antigen, that is, a blood sample that belongs to either blood group A or blood group B. Give your answer as a whole number percentage. Probability

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### Blood Group Distribution in the Caucasian Population

Two antigens, antigen A and antigen B, determine the four major human blood groups: A, B, AB, and O. The table below shows the percentage distribution of blood groups for the Caucasian population in the United States (American Red Cross, 2016).

| Blood Group | A  | B  | AB | O  |
|-------------|----|----|----|----|
| Antigen     | A  | B  | A, B | None |
| Distribution| 40%| 11%| 4% | 45% |

#### Explanation:

- **Blood Group A:** Has antigen A and accounts for 40% of the population.
- **Blood Group B:** Has antigen B and accounts for 11% of the population.
- **Blood Group AB:** Has both antigens A and B, accounting for 4% of the population.
- **Blood Group O:** Has no antigens and constitutes 45% of the population.

#### Probability Calculation

Calculate the probability of randomly picking a blood sample that contains only one antigen, that is, a blood sample that belongs to either blood group A or blood group B. Give your answer as a whole number percentage.

\[ \text{Probability} = \text{______} \% \]

#### Source

American Red Cross. Blood Types. [http://www.redcrossblood.org/learn-about-blood/blood-types](http://www.redcrossblood.org/learn-about-blood/blood-types) (accessed July 27, 2016).
Transcribed Image Text:### Blood Group Distribution in the Caucasian Population Two antigens, antigen A and antigen B, determine the four major human blood groups: A, B, AB, and O. The table below shows the percentage distribution of blood groups for the Caucasian population in the United States (American Red Cross, 2016). | Blood Group | A | B | AB | O | |-------------|----|----|----|----| | Antigen | A | B | A, B | None | | Distribution| 40%| 11%| 4% | 45% | #### Explanation: - **Blood Group A:** Has antigen A and accounts for 40% of the population. - **Blood Group B:** Has antigen B and accounts for 11% of the population. - **Blood Group AB:** Has both antigens A and B, accounting for 4% of the population. - **Blood Group O:** Has no antigens and constitutes 45% of the population. #### Probability Calculation Calculate the probability of randomly picking a blood sample that contains only one antigen, that is, a blood sample that belongs to either blood group A or blood group B. Give your answer as a whole number percentage. \[ \text{Probability} = \text{______} \% \] #### Source American Red Cross. Blood Types. [http://www.redcrossblood.org/learn-about-blood/blood-types](http://www.redcrossblood.org/learn-about-blood/blood-types) (accessed July 27, 2016).
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