The probability that a person in the United States has type B​+ blood is 10​%. Three unrelated people in the United States are selected at random. Complete parts​ (a) through​ (d).       ​(a) Find the probability that all three have type B​+ blood.   The probability that all three have type B​+ blood is nothing. ​(Round to six decimal places as​ needed.) ​(b) Find the probability that none of the three have type B​+ blood.   The probability that none of the three have type B​+ blood is nothing. ​(Round to three decimal places as​ needed.) ​(c) Find the probability that at least one of the three has type B​+ blood.   The probability that at least one of the three has type B​+ blood is nothing. ​(Round to three decimal places as​ needed.) ​(d) Which of the events can be considered​ unusual? Explain. Select all that apply.     A. None of these events are unusual.   B. The event in part​ (b) is unusual because its probability is less than or equal to 0.05.   C. The event in part (a) is unusual because its probability is less than or equal to 0.05.   D. The event in part​ (c) is unusual because its probability is less than or equal to 0.05.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The probability that a person in the United States has type
B​+
blood is
10​%.
Three
unrelated people in the United States are selected at random. Complete parts​ (a) through​ (d).
 
 
 
​(a) Find the probability that all
three
have type
B​+
blood.
 
The probability that all
three
have type
B​+
blood is
nothing.
​(Round to six decimal places as​ needed.)
​(b) Find the probability that none of the
three
have type
B​+
blood.
 
The probability that none of the
three
have type
B​+
blood is
nothing.
​(Round to three decimal places as​ needed.)
​(c) Find the probability that at least one of the
three
has type
B​+
blood.
 
The probability that at least one of the
three
has type
B​+
blood is
nothing.
​(Round to three decimal places as​ needed.)
​(d) Which of the events can be considered​ unusual? Explain. Select all that apply.
 
 
A.
None of these events are unusual.
 
B.
The event in part​ (b) is unusual because its probability is less than or equal to 0.05.
 
C.
The event in part (a) is unusual because its probability is less than or equal to 0.05.
 
D.
The event in part​ (c) is unusual because its probability is less than or equal to 0.05.
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