All High School Math Resources
Example Questions
Example Question #12 : Understanding Mean, Median, And Mode
Each student's grade in Becky's math class is determined using a weighted average. Exams comprise 50% of the grade, quizzes comprise 20%, and homework comprises the final 30%. Becky has an 87% average on tests, 82% on quizzes, and 97% on homework. What is her overall grade?
First, convert the weighted percents to decimals.
Next, multiply each score by the weight.
Finally, sum all of the weighted scores.
Example Question #16 : Understanding Mean, Median, And Mode
Find the mean and median of the following data set:
Mean:
Median:
Mean:
Median:
Mean:
Median:
Mean:
Median:
Mean:
Median:
Mean:
Median:
The mean is the sum of the numbers divided by their count:
To find the median, order the set from smallest to largest:
When there are two numbers in the middle, find the average of those numbers:
Example Question #33 : Basic Statistics
Albert's biology grade is based on the average of three test scores and a final. The final is worth twice a regular test. What is the minimum grade he must get on the final to get an A in the course if his other test scores were ?
The average is the sum of the data divided by the total number of data points.
Let final score.
Simplify so the equation to solve becomes .
Cross multiplying we get .
Then subtract from both sides and divide by to get .
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