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grade 11 · A2-017
Use the probability addition rule
Add two event probabilities and subtract their shared intersection once.
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Fresh problem · seed 1848554602
In a sample of 100 outcomes, event A occurs 27 times, event B occurs 42 times, and both occur 12 times. How many outcomes are in \(A\cup B\)?
15
30
12
A
B
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