Question 3

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B0/2 pts

A friend has a 81% average before the final exam for a course. That score includes everything but

the final, which counts for 20% of the course grade.

What is the best course grade your friend can earn?

What is the minimum score would your friend would need on the final to earn a 75% for the course?

Give answers accurate to at least one decimal place.

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Answer:The best course grade your friend can earn is 0.848 = 84.8%.

The minimum score would your friend would need on the final to earn a 75% for the course is of 0.51 = 51%.

Step-by-step explanation:This is a

weighed average problem, in which we multiply each grade by its weight.We have that:In 80% of the course, the friend has a grade of 81%.

In the other 20%, he will have x.

What is the best course grade your friend can earn?This will happen if he earns 100% = 1 on the final test. So

The best course grade your friend can earn is 0.848 = 84.8%.

What is the minimum score would your friend would need on the final to earn a 75% for the course?This is x, when the grade is 0.75. So

The minimum score would your friend would need on the final to earn a 75% for the course is of 0.51 = 51%.