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Jane Street Interview Question

Jane StreetTrading Interview

You are going camping over the weekend, and there is 50% chance of rain on Saturday and 60% on Sunday. What is the probability that you will not experience rain? (You are not told whether they are independent, so that is something to consider). Then, after giving your answer, assume they are not independent, and are positively correlated. Will the chance of having a 'dry' weekend increase or decrease?

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