Human Blood Types Human blood is grouped into four types.

Chapter 4, Problem 21E

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QUESTION:

Problem 21E

Human Blood Types Human blood is grouped into four types. The percentages of Americans with each type are listed below.

O

43%

A

40%

B

12%

AB

 5%

Choose one American at random. Find the probability that this person

a. Has type O blood

b. Has type A or B

c. Does not have type O or A

Source: www.infoplease.com

Questions & Answers

QUESTION:

Problem 21E

Human Blood Types Human blood is grouped into four types. The percentages of Americans with each type are listed below.

O

43%

A

40%

B

12%

AB

 5%

Choose one American at random. Find the probability that this person

a. Has type O blood

b. Has type A or B

c. Does not have type O or A

Source: www.infoplease.com

ANSWER:

Solution:

Step 1 of 3:

        The percentages of Americans with each type are given by

 

O

43%

A

40%

B

12%

AB

5%

a). We have to find the probability that this person has an O blood  type.

 

       Thus,

                P(O type) =

        Hence, the person has O blood type is 0.43.


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