All GRE Subject Test: Math Resources
Example Questions
Example Question #11 :Probability & Statistics
John has math test scores of. What could be his final test score if he wants the average of his exams to be at least?
To find the missing value, we add the terms up and divide them byto have the average of.
Cross-multiply.
Subtract both sides by
Since the question is asking for a test score that will generate AT LEAST average of, we look for an answer that is greater thanwhich is.
Example Question #12 :Probability & Statistics
Sam has math test scores of. The teacher drops the lowest test score except the final and the highest test score is counted as two exams. If Sam took his final exam and felt he scored betweeninclusive, what is the lowest possible average of his exams?
We have four test scores of. We know the range of the final exam isso therefore theis counted twice. Since the final exam grade regardless if the lowest possible value can't be dropped, this means we drop theand include the lowest possible test score which is. So the mean is:
Example Question #13 :Probability & Statistics
There wereexams graded. The average of the exams were. If the average ofexams were, what was the average of the remaining exams?
Withexams of average, the sum of the scores were.
We already know the firstexams with average of. Therefore, the sum is.
The remaining number of exams isor.
The remaining sum isor.
We dividebyto get.
Example Question #14 :Probability & Statistics
What is the mean of the scores 95, 13, 67, 89, 13, 45, and 109?
To get the average or mean, add up all the scores and then divide by the number of scores.
There are seven scores so divide that number by 7
Example Question #11 :Probability & Statistics
Find the mean of the set of numbers containing:.
Step 1: We need to know how to find mean. To find mean, add up all the numbers in the set and divide by how many numbers are in the set.
Step 2: Let's find the sum:
.
Step 3: Count how many numbers are in the set.
..There are 9 numbers.
Step 4: Divide the sum by 9 to find the average.
.
组数据的平均值
Example Question #11 :Statistics
What is the mean of?
Step 1: Find the sum of all the numbers.
Step 2: Divide the sum by how many numbers there are. There are 11 numbers.
The mean (average) of all numbers above is.
Example Question #11 :Statistics
What is the mean of
Step 1: Find the sum of all the numbers:
Step 2: Divide the sum by how many numbers are given to get the mean..
There arenumbers...
Example Question #11 :Statistics
What is the mean of?
Step 1: Find the sum of all numbers:
Step 2: Count how many numbers are in the question..
We havenumbers.
Step 3: Divide sum by how many numbers
Example Question #21 :Probability & Statistics
What is the mean of
Step 1: Find the sum of the numbers
Step 2: Find how many numbers
There arenumbers..
Step 3: Divide the sum by how many numbers they are...This division gives us the mean..
Example Question #14 :Statistics
What is the mean of:
Step 1: Find the sum of the numbers
Step 2: Find how many numbers are there
I countednumbers.
Step 3: Divide Sum by how many numbers
The mean is.
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