Four Fair Coins Are Flipped $X _ { 1 }$ Corresponding to Sum =0

question 12

Essay

Four fair 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 $X _ { 1 }$ corresponding to sum =0, $X _ { 2 }$ to sum = 1, etc.The probability of the source
producing $X _ { 3 }$ equals _______.

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Definitions:

Synapse

The junction between nerve cells where neurotransmitters are released, allowing signals to pass from one neuron to another.

Spinal Cord

A vital part of the central nervous system, the spinal cord is a long, thin, tubular structure made of nervous tissue, which extends from the brain and is encased within the vertebral column, responsible for sending messages between the brain and the rest of the body.

Hormones

Biological molecules produced by glands that regulate bodily functions and behavior by traveling through the bloodstream to target organs.

Neurons

Nerve cells that transmit information throughout the body and brain, serving as the building blocks of the nervous system.