A source produces 4 symbols with probabilities 1/2, 1/4, 1/8 and 1/8. For this source, a practical coding scheme has an average code word length of 2 bits / symbol. The efficiency of the code is:

A source produces 4 symbols with probabilities 1/2, 1/4, 1/8 and 1/8.

1.	A source produces 4 symbols with probabilities 1/2, 1/4, 1/8 and 1/8. For this source, a practical coding scheme has an average code word length of 2 bits / symbol. The efficiency of the code is:
A.	1
B.	7 / 8
C.	1 / 2
D.	1 / 4
Answer» C. 1 / 2

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A source produces 4 symbols with probabilities 1/2, 1/4, 1/8 and 1/8. For this source, a practical coding scheme has an average code word length of 2 bits / symbol. The efficiency of the code is:

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