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    Engineering
  3. Study Set
    The Digital Information
  4. Exam
    Exam 9: Source Coding
  5. Question
    Four Coins Are Flipped\(\mathrm { X } _ { 1 }\)
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Four Coins Are Flipped X1\mathrm { X } _ { 1 }X1​

Question 3

Question 3

Essay

Four coins are flipped.Each coin tail is recorded as a 0 and a head as a 1 and the source symbol is the sum, with X1\mathrm { X } _ { 1 }X1​ corresponding to sum =0, X2X _ { 2 }X2​ to sum = 1, etc.The number of unique symbols is
_______.

Correct Answer:

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