ECE Ph.D. Qualifying Exam

Communication Signal (CS)

Question 1: Random Variable

August 2016 Problem 1


Solution

The probability is $ \dfrac{1}{3} $
Possible outcome with a coin landed head:
$ ++,-+,+- $
And the probability of each outcome are equal.
Such that the probability of both coin land head is $ \dfrac{1}{3} $


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Sean Hu, ECE PhD 2009