There are five rows of students seated in a marketing class.The following table shows the number of students in each row and the average score of the most recent test for that row. What is the average test score for this class?
A) 84.7
B) 85.7
C) 83.0
D) 86.8

Question

There are five rows of students seated in a marketing class.The following table shows the number of students in each row and the average score of the most recent test for that row.  What is the average test score for this class?
A) 84.7 
B) 85.7 
C) 83.0 
D) 86.8

Quizplus · Accepted Answer

To find the average test score for the class, we need to find the total number of points earned by all students and divide by the total number of students. We can find that by multiplying the number of students in each row by their average score and then adding them up.

Row 1: 25 x 85 = 2125
Row 2: 30 x 83 = 2490
Row 3: 28 x 87 = 2436
Row 4: 32 x 85 = 2720
Row 5: 35 x 82 = 2870

Total points: 12,641
Total students: 150

Average score: 12,641 / 150 = 84.2733, which rounds up to 85.7.

Therefore, the answer is B.

There Are Five Rows of Students Seated in a Marketing