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rjkz [21]
3 years ago
12

The probability that a person in the United States has type B​+ blood is 13​%.

Mathematics
1 answer:
blondinia [14]3 years ago
3 0

Answer:

Step-by-step explanation:

Given that the probability that a person in the United States has type B​+ blood is 13​%.

Since four unrelated people in the United States are selected at random, we can say that each person is independent of the other to have B+ blood group.

Let X be the number of persons who have blood group B+ in the group of 4 persons.

X is Binomial with p = 0.13

a) P(X = 4) = (0.13)^4 = 0.000286

b) P(x =0) = (1-0.13)^4 = 0.572898

c) P(X\geq 10 = 1-P(0) = 0.427102

d) All having B+ is unusual since probability is very negligible

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Answer:

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Step-by-step explanation:

This problem is complicated by the use of two different units.  I chose to use inches for the dimensions of the carpet.

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