Question

In a class of 28 students, 15 earned an A on the final exam, 10 earned an A for the entire course, and 7
earned an A for both the final exam and the entire course. What is the probability that a randomly
selected student in this class did not earn an A on the final exam and did not earn an A for the entire course

Answer 1

The probability a student did not earn an A on the final exam or entire course is 75%.

What is probability?

This refers to the likeliness for an event to occur, which can be expressed using percentages.

How to calculate the probability?

The general formula is the number of specific outcomes/ total of outcomes.

What is the probability in this case?

The number of students who did not earn an A on the final exam or entire course: 21 (only 7 students earned an A on both)

• Total outcomes or students: 28
• 21/28 = 0.75 or 75%.

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