A group of students has an average score of 75. If one student with a score of 90 leaves, what will be the new average if the group size is 10?
Practice Questions
1 question
Q1
A group of students has an average score of 75. If one student with a score of 90 leaves, what will be the new average if the group size is 10?
72
73
74
75
Total score = 75 * 10 = 750. New total = 750 - 90 = 660. New average = 660 / 9 = 73.33.
Questions & Step-by-step Solutions
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Q
Q: A group of students has an average score of 75. If one student with a score of 90 leaves, what will be the new average if the group size is 10?
Solution: Total score = 75 * 10 = 750. New total = 750 - 90 = 660. New average = 660 / 9 = 73.33.
Steps: 3
Step 1: Calculate the total score of the group. Since the average score is 75 and there are 10 students, multiply 75 by 10. Total score = 75 * 10 = 750.
Step 2: Subtract the score of the student who is leaving. The student has a score of 90, so subtract 90 from the total score. New total score = 750 - 90 = 660.
Step 3: Calculate the new average score. Now there are 9 students left in the group, so divide the new total score by 9. New average = 660 / 9 = 73.33.
