Using the weighed mean formula, it is found that Mara's average for the course was of 68.6.
<h3>What is the weighed mean?</h3>
The weighed mean is given by the <u>sum of all elements in a data-set multiplied by it's weight, divided by the sum of the weights</u>.
In this problem, the weights are as follows:
- A quiz has a weight of 1.
- A test has a weight of 2.
- The final examination has a weight of 4.
Hence, her weighed mean is given as follows:

Mara's average for the course was of 68.6.
More can be learned about the weighed mean formula at brainly.com/question/24398353
2 = 8 / 4
8 / 4 - 1 / 4 = 7 / 4
They ate 7/4 lbs, or 1.75 lbs.
30:42 is represented as 30/42
The lowest form for that is 5/7. Hope that helped. Good luck
Answer:
The answer is 90
Step-by-step explanation: