A Recent Survey Shows That the Probability of a College

question 126

Multiple Choice

A recent survey shows that the probability of a college student drinking alcohol is 0.6. Further, given that the student is over 21 years old, the probability of drinking alcohol is 0.8. It is also known that 30% of the college students are over 21 years old. The probability of drinking or being over 21 years old is ________.

• A) 0.24.
• B) 0.42.
• C) 0.66.
• D) 0.90.

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Definitions:

Perfect Competition

A market structure characterized by a large number of buyers and sellers, homogeneous products, and easy entry and exit, leading to price-taking behavior.

Most Efficient Output

The level of production at which a firm or economy can produce goods at the lowest average cost, maximizing the use of resources.

ATC Curve

The Average Total Cost Curve, which represents the average cost per unit of output over various levels of production, illustrating how costs change with output levels.

AVC Curve

The average variable cost curve, which plots the variable cost per unit of output at different levels of production.