Suppose That 60% of the Students Do Homework Regularly

question 77

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. What is the probability that a student does well in the course?

• A) 0.080
• B) 0.480
• C) 0.560
• D) 0.857

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Definitions:

Prefix

An affix placed before the stem of a word to modify its meaning, such as "un-" in "unhappy" or "pre-" in "preview."

Before

Prior to in time or order.

Dis-

A prefix indicating separation, removal, or negation.

Dislocate

To displace the bones of a joint, causing them to no longer be in their proper relation to each other.