Consider a binary code to distinguish the elements of a set {a, b, c, d}, with P(a) = 0.7, P(b)=0.15, P(c)=0.1 and P(d)=0.05. On average, how many bits will be used by a sequence of 20 elements confirming to the probability distribution given above. i.e. aaaaaaaaaaaaabbbccd Group of answer choices a. 18 b. 26 c. 2 d. 40

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider a binary code to distinguish the elements of a set {a, b, c, d}, with P(a) = 0.7, P(b)=0.15, P(c)=0.1 and P(d)=0.05.

On average, how many bits will be used by a sequence of 20 elements confirming to the probability distribution given above.

i.e. aaaaaaaaaaaaabbbccd

Group of answer choices
a. 18
b. 26
c. 2
d. 40
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