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Bookmarks Window Help elearn.une.edu maining Time: 1 hour, 01 minute, 51 seconds. estion Completion Status: It is known that 25% of 11-year-old children have no decayed, missing, or filled (DMF) teeth. I no DMF teeth. O a. .25 b..002 d..003 UESTION 4 Here is the distribution of blood types for a randomly chosen person in the United States Blood Type AB o U.S. Probability .4 .04 .45 Select three people at random. What is the probability that all have type B blood? a. .001 b..33 C. .01 d..1 QUESTION 5 In a study of the relationship between health risk and income, a large group of people living in results are shown in the following table. Low Income Medium Income Smoke 634 332

Explanation / Answer

Question 4

Solution:

We are given

Number of people = n = 3

Probability of blood group B = p = 0.11

We have to find P(X=3)

We have to use binomial formula given as below:

P(X=x) = nCx*p^x*(1 – p)^(n – x)

P(X=3) = 3C3 * 0.11^3 * (1 – 0.11)^(3 – 3)

P(X=3) = 1*0.11^3*0.89^0

P(X=3) = 1*0.11^3*1

P(X=3) = 0.11^3

P(X=3) = 0.001331

Required probability = 0.001

Correct Answer: a

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