(a) Draw the Bayesian network describing the scenario just described, and express the joint probability in factorised form, defining appropriate variables.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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The windscreen washers of an old car don't work (W = 0). This could be for two reasons: the windscreen fluid tank is empty (E = 1) or the tube is has a blockage (B = 1). Being an old car, the light to indicate that the windscreen fluid tank is empty only comes on (L = 1) 75% of the time. It will sometimes comes on even if the tank has some fluid in it, with probability 0.25. Of course the tube could be both blocked and the tank empty. (a) Draw the Bayesian network describing the scenario just described, and express the joint probability in factorised form, defining appropriate variables. 

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