I know I'm over-thinking the following question, I just need to know how to start!
In a certain population of women 4% develop symptoms of a classic disease, 20% are smokers, and 3% are smokers and have developed the symptoms of the disease.
a) Find the probability that a randomly selected woman from this population has developed symptoms of the disease, or is a smoker, or both.
b) Find the probability that a randomly selected woman from this population is not a smoker and has not developed symptoms of the disease.
Please help! Thank you.
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