The grade distribution for a certain class is shown in the table. Find the probability distribution associated with these data. 
Definitions:
Radio
A technology that uses radio waves to transmit information, such as sound, by modulation.
Satellite
An artificial object placed into orbit around the Earth or another body in space for the purpose of communication, navigation, or observation.
Fiber
A type of material used in telecommunications that transmits light to carry information over long distances.
Dematerialization
The process of reducing the use of physical resources in the production and distribution of goods and services, often through digitalization.
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