The mean score on Mr. Pascal’s first semester exam for his 28 students is 73 points. If he removes the lowest score of 19 points, what is the adjusted class average (arithmetic mean)?
sum / 28 = 73
solve for sum
(sum - 19) /27 = ?
(credit to Damon)
awdaw
To find the adjusted class average, follow these steps:
1. Calculate the sum of all the scores: Multiply the mean score (73 points) by the number of students (28).
Total score = 73 * 28 = 2044 points
2. Subtract the lowest score (19 points) from the total score calculated in step 1.
Adjusted total score = Total score - lowest score = 2044 - 19 = 2025 points
3. Divide the adjusted total score by the number of remaining students (since one score was removed).
Adjusted class average = Adjusted total score / (Number of students - 1) = 2025 / 27 ≈ 75 points
Therefore, the adjusted class average is approximately 75 points.