In your biology class, your final grade is based on several things: a lab score,
ID: 3178341 • Letter: I
Question
In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 23% of your total grade, each major test is worth 23%, and the final exam is worth 31%. Compute the weighted average for the following scores: 75 on the lab, 61 on the first major test, 65 on the second major test, and 84 on the final exam. (Enter your answer to one decimal place.)
Explanation / Answer
For this we would need to multiply each score by its weight. Then add those up and divide by the sum of the weights.
It can be calculated as below
((23*75) + (23*61) + (23*65) + (31*84)) / (23 + 23 + 23 + 31)
= (1725 + 1403 + 1495 + 2604)/100 = 7227/100
= 7227/100 which gives us 72.27% or 72.3% when rounded to one decimal.