A) Consider this problem: Every person in the world has a blood type that falls

Question

A) Consider this problem: Every person in the world has a blood type that falls into one of the classes A, B, O, or AB. In the US, the distribution is:

O: 0.45

B: 0.11

A: 0.40

AB: 0.04

What is the probability that a randomly chosen American can donate blood to a person with Type B blood? (A person can recieve only his/her own blood type or Type O blood.)

Also, identify which distribution type this system has (Poisson or binomial)

B) The distribution of blood types in China is different:

O: 0.35

B: 0.26

A: 0.27

AB: 0.12

Choose an American and a Chinese at random. What is the probability that both will have type O blood?

Explanation / Answer

randomly chosen American can donate blood to a person with Type B blood means that person can donate to either Type B or Type O.

so required probability=P(B)+P(O)=0.11+0.45=0.56

distribution type this system will be binomial

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