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if event A has a 30% chance of occurring and event B has a 45% chance of occurring, what is the probability that event A or event B will occur

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baabaagreysheep
The answer is 75%. This is because the 'or' rule for probability, the one we use when trying to determine P(A) or P(B), is to add the two probabilities. This means that we just need to add 30% and 45%, which gives us 75%.
I hope this helps!

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