Suppose That 60% of the Students Do Homework Regularly

question 70

Multiple Choice

Suppose that 60% of the students do homework regularly. It is also known that 80% of students who had been doing homework regularly, end up doing well in the course. Only 20% of students who had not been doing homework regularly end up doing well in the course. Given that a student did well in the course, what is the probability that the student had been doing homework regularly?

• A) 0.286
• B) 0.857
• C) 0.143
• D) 0.429

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Definitions:

Break-Even Quantity

The number of units that must be sold to cover all fixed and variable costs, resulting in neither profit nor loss.

Break-Even Quantity

The number of units that must be sold for total revenues to equal total costs, resulting in no profit or loss.

Fixed Costs

Business expenses that remain constant regardless of the level of production or sales activities.

Marginal Cost

The additional cost incurred by producing one more unit of a particular good or service.