Four Coins Are Flipped $\mathrm { X } _ { 1 }$

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 $\mathrm { X } _ { 1 }$ corresponding to sum =0, $X _ { 2 }$ to sum = 1, etc.The number of unique symbols is
_______.

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Definitions:

ISP

Internet Service Provider, a company that provides individuals and organizations access to the internet.

Acknowledgment

A recognition of the receipt of something or the validity of a fact.

HTML

Hypertext Markup Language is the official markup language utilized for the construction and design of websites.

Circuit Switching

A method in telecommunications where a dedicated communication path is established between two points for the duration of the conversation.