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A student scored 80, 90, and 70 in three subjects. If the fourth subject is scor
A student scored 80, 90, and 70 in three subjects. If the fourth subject is scored 100, what will be the weighted average of the scores?
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Q1
A student scored 80, 90, and 70 in three subjects. If the fourth subject is scored 100, what will be the weighted average of the scores?
85
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80
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The average is (80 + 90 + 70 + 100) / 4 = 85.
Questions & Step-by-step Solutions
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Q
Q: A student scored 80, 90, and 70 in three subjects. If the fourth subject is scored 100, what will be the weighted average of the scores?
Solution:
The average is (80 + 90 + 70 + 100) / 4 = 85.
Steps: 5
Show Steps
Step 1: Add all the scores together. The scores are 80, 90, 70, and 100.
Step 2: Calculate the total: 80 + 90 + 70 + 100 = 340.
Step 3: Count the number of subjects. There are 4 subjects.
Step 4: Divide the total score by the number of subjects: 340 / 4.
Step 5: Calculate the result: 340 / 4 = 85.
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