Answer:
8/19
Explanation:
You want the probability P(A'|B) represented in the given Venn diagram.
Probability
The probability associated with an area of the Venn diagram is the ratio of the number in that area to the total of all numbers on the diagram.
The total of all numbers on the diagram is 18 +5 +11 +8 = 42.
The conditional probability of interest is ...
P(A'|B) = P(A'B)/P(B)
P(A'|B) = (8/42)/((11 +8)/42)
P(A'|B) = 8/19
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