The following table summarizes the ages of the 400 richest Americans.Suppose we select one of these individuals.Find the probability that the selected individual is less than 80 years old. 
Definitions:
Outside Investment
Funds acquired from external sources, such as venture capitalists or angel investors, to finance the operations or growth of a business.
Seed-stage Financing
A type of funding provided to new companies or startups to help them develop their business concept or product.
Capital
Financial assets or resources that individuals or companies use for investment, production, or starting a new business.
Concept
A general idea or understanding that represents something abstract or concrete in the mind, serving as the building block for knowledge, theories, or innovations.
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