What is the portfolio variance if 60% is invested in stock K and 40% is invested in stock L? 
Definitions:
Corporate Chains
Entities consisting of multiple businesses owned and operated by a single organization, often standardized in operations and branding.
Corporate Chain
A series of businesses or retail outlets owned and operated by a single company, offering uniform products or services.
Consumer Cooperative
A business owned and operated by the consumers it serves, where benefits and profits are distributed among the members.
Contractual System
A method of organization involving formal agreements between parties that specify the roles, responsibilities, and conditions of a business relationship.
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