When randomly selecting an adult, let b represent the event of
randomly selecting someone with type b blood. write a sentence describing what the rule of
complements is telljng us: p(b or
¯
b
) = l.

P (B or B’)=1 means that an adult is certain to have a blood type B or an adult doesn’t have a blood type B .

Step-by-step explanation:

Given the information from the question.  Let B = the event of randomly selecting an adult with a blood type B.

Know the complement rule in probability theory. The B’ (B complement) is the event that an adult doesn’t have a blood type B.

To answer the question. P (B or B’)=1 means that an adult is certain to have a blood type B or an adult doesn’t have a blood type B .

d) -1

step-by-step explanation:

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