Question

17. Below are the approximate percentages of the different blood types for people in the United States.

Type ???? 44%
Type ???? 42%
Type ???? 10%
Type ????B 4%
Consider a group of 100 people with a distribution of blood types consistent with these percentages. If two people are randomly selected with replacement from this group,
what is the probability that
a. Both people have type ???? blood?
b. The first person has type ???? blood and the second person has type ????B blood?

Answer 1

Answer: a. 0.1936, or 0.1764,or 0.01, or 0.0016

b. 0.2464

Explanation:

a. For question a, let blood type be

Type A, type type AB, type O and type B.

If 2 people are selected at random from 100 people, pthe probability that they are type A is 0.1936

They are type AB is 0.1764

They are type O is 0.01

They are type B is 0.0016

b. The probability that the first person is type A is 0.2464. This means the first is type A and the second could either be type AB or type O or type B.