A class of 27 students took a test.
• 9 students received 80%;
• 5 students received 70%; and
• 13 students received 55%.
What is the mean score for the class?
A) 66%
B) 67%
C) 73%
D) 68%
To find the mean score for the class, we need to calculate the total score earned by all students and then divide by the total number of students.
Total score for students who received 80%: 9 * 80 = 720
Total score for students who received 70%: 5 * 70 = 350
Total score for students who received 55%: 13 * 55 = 715
Total score for all students: 720 + 350 + 715 = 1785
Total number of students: 27
Mean score for the class: 1785 / 27 = 66.11%
Therefore, the mean score for the class is approximately 66%, so the answer is A) 66%.