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A factory makes automobile parts. Each part has a code consisting of a letter and three digits, such as C117, O076, or Z920. Last week the factory made 60,000 parts. Prove that there are at least three parts that have the same serial number.
Total Income
The sum of all earnings or revenue generated by an individual or entity.
United States
A nation situated in North America, made up of 50 states and one federal district, renowned for its vast economy and varied demographics.
Factors of Production
The inputs used in the production of goods or services in the process of economic activity, including land, labor, capital, and entrepreneurship.
Inputs
Resources such as labor, capital, and materials used in the production process to create an output.
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