00:51:13 This Test: 1 The probability that a person in the United States has typ

Question

00:51:13 This Test: 1 The probability that a person in the United States has type B. blood is 12% Four (a) Find the probability that all four have type B' blood The probability that all four have type B+ blood is (Round to six decimal places as needed ) (b) Find the probability that none of the four have type B' blood The probability that none of the four have type B. blood is Round to three decimall places as needed.) (e) Find the probability that at least one of the four has type B' blood The probability that at least one ofthe four has type B. bloods (Round to three decimal places as neoded ) (d) Which of the events can be considered unusual? Explain. Select all that apply

Explanation / Answer

This is a case of Binomial distribution, with n= 4

p = 0.12

q = 0.88

A) P(all 4 have B+ blood group) = 0.124

= 0.000207

B) P(none of the 4 have B+ blood group) = 0.884

= 0.600

C) P(at least 1 have B+ blood group) = 1 - 0.600

= 0.400

D) The event 'all 4 having blood group B+' is unusual, because the probability is less than 0.05

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