Problem 111 of 7
Identify dependent events from changed probability in P(getting a cold)=0.20 but P(getting a cold | exposed to virus)=0.50.
Using a hint is okay. It just tells the trainer to give you a little more review.
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compare observed joint to product.
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Dependence is indicated when knowing one event changes the probability of the other.
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Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Identify the original probability.
2. Identify the probability after the condition or first event.
3. Conclude dependence if the probability changes.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Saying events are dependent merely because they happen in sequence.