It has been claimed that the best predictor of today’s weather is today’s weather. Suppose that in the town of Octapa, if it rained yesterday, then there is a 60% chance of rain today, and if it did not rain yesterday there is an 85% chance of no rain today.   a. If it did not rain Friday, what is the probability of rain on Monday? please don't use tree diagram.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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It has been claimed that the best predictor of today’s weather is today’s weather. Suppose that in the town of Octapa, if it rained yesterday, then there is a 60% chance of rain today, and if it did not rain yesterday there is an 85% chance of no rain today.

 

a. If it did not rain Friday, what is the probability of rain on Monday?

please don't use tree diagram. 

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