broskiesmark9572 broskiesmark9572

24-05-2023
Mathematics

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What is the z-score of x = 4.2 for a random variable X that is distributed normally with a mean of 5 and a variance of 4? If P(A)=0.3, P(AUB) = 0.4, and P(A ∩ B)= 0.2, what is the value of P(B)?

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