The weather in Vancouver is such that if it rains onany particular day, then the probability that

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Question:

The weather in Vancouver is such that if it rains onany particular day, then the probability that i twill rain
on the following day is 0.8. Also, if it doesn’t rain onsomeday, then the probability that will rain on the following dayis 0.5. Suppose it rains on some Monday.

What is the expected number of rainy days during this 4-dayperiod?