Math Problem Statement
Solution
To solve the problem, we need to calculate the average (mean) of the given scores and determine how many students scored above this average.
Step 1: Calculate the Total Number of Students
The total number of students is the sum of the frequencies:
Step 2: Calculate the Sum of All Scores
The sum of all scores is the weighted sum of the scores, which is each score multiplied by its frequency:
Calculating each term:
Adding these together gives:
Step 3: Calculate the Average Score
The average score is the sum of all scores divided by the total number of students:
Step 4: Determine the Number of Students Scoring Above the Average
We need to count the students with scores above 7.0167, which means considering scores of 8 and 9:
- Frequency of score 8: 30
- Frequency of score 9: 12
Adding these together:
So, the number of students who passed (scored above the average) is:
(D) 42
Summary
The answer is 42 students who scored above the average.
Would you like details or have any questions? Here are 5 related questions for further exploration:
- How would the median score be calculated from the given data?
- What is the mode of the scores in the provided table?
- How would the variance and standard deviation of the scores be calculated?
- How many students scored below the average?
- How would the average change if one more student scored 9?
Tip: When calculating the average of a dataset, ensure to account for all occurrences of each value correctly by using their frequencies.
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Math Problem Analysis
Mathematical Concepts
Mean
Frequency Distribution
Weighted Averages
Formulas
Mean = (Sum of all values) / (Total frequency)
Weighted Sum = Value * Frequency
Theorems
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Suitable Grade Level
Grade 12
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