Unrelated people in the us are selected at random

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The probability that a person in the US has B+ blood is 9%. Four unrelated people in the US are selected at random. 

(a) The probability that all four haves type B+ blood is? Round to six decimal places as needed.

(b) The probability that none of the four have type B+ blood is? Round to six decimal places as needed.

(c) The probability that at least one of the four has type B+ blood is? Round to three decimal places as needed. 

(d) Are any of the events unusual and why?

Reference no: EM132155575

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