A class has 30 students. If the average score of the class is 75 and one student scored 90, what is the average score of the remaining students?
Practice Questions
1 question
Q1
A class has 30 students. If the average score of the class is 75 and one student scored 90, what is the average score of the remaining students?
72
74
76
78
Total score of 30 students = 30 * 75 = 2250. Total score of remaining 29 students = 2250 - 90 = 2160. Average of remaining = 2160 / 29 = 74.48, approximately 74.
Questions & Step-by-step Solutions
1 item
Q
Q: A class has 30 students. If the average score of the class is 75 and one student scored 90, what is the average score of the remaining students?
Solution: Total score of 30 students = 30 * 75 = 2250. Total score of remaining 29 students = 2250 - 90 = 2160. Average of remaining = 2160 / 29 = 74.48, approximately 74.
Steps: 4
Step 1: Calculate the total score of all 30 students by multiplying the average score by the number of students. Total score = 30 students * 75 average score = 2250.
Step 2: Subtract the score of the one student who scored 90 from the total score. Remaining score = 2250 - 90 = 2160.
Step 3: Calculate the average score of the remaining 29 students by dividing the remaining score by the number of remaining students. Average of remaining = 2160 / 29.
Step 4: Perform the division to find the average score of the remaining students, which is approximately 74.48.
