Professor Elderman Has Given the Same Multiple-Choice Final Exam in His

question 113

Multiple Choice

Professor Elderman has given the same multiple-choice final exam in his Principles of Microeconomics class for many years. After examining his records from the past 10 years, he finds that the scores have a mean of 76 and a standard deviation of 12. Professor Elderman offers his class of 36 a pizza party if the class average is above 80. What is the probability that he will have to deliver on his promise?

• A) 0.0228
• B) 0.3707
• C) 0.6293
• D) 0.9772

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Definitions:

Concentration Gradient

The gradual difference in the concentration of solutes in a solution between two regions.

Active Transport

The movement of substances across cell membranes against a concentration gradient, requiring energy input typically from ATP.

Diffusion

The process by which molecules move from an area of higher concentration to an area of lower concentration, contributing to the movement of substances within and between cells.

Osmotic Pressure

The pressure that needs to be applied to a solution to prevent the inward flow of water across a semipermeable membrane.