If PA) = 0.45, PB) = 0.55, and PA ∪ B) = 0.78, then PA | B) =
A) zero
B) 0.45
C) 0.22
D) 0.40

Name: If PA) = 0.45, PB) = 0.55, and PA ∪ B) = 0.78, then PA | B) = A) zero B) 0.45 C) 0.22 D) 0.40
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The conditional probability PA | B) is calculated using the formula PA ∩ B) / PB). First, find PA ∩ B) using PA ∪ B) = PA) + PB) - PA ∩ B), which gives PA ∩ B) = 0.22. Then, PA | B) = 0.22 / 0.55 = 0.40.