All ISEE Middle Level Quantitative Resources
Example Questions
Example Question #82 : Statistics & Probability
In a group of 4 books, the average number of pages is is 10. Juan adds a book with 20 pages to the group. What is the new average number of pages?
If the average of 4 books was 10, then the total number of pages was . Adding in the 20 new pages, but now dividing by 5 you get .
Example Question #1 : How To Find Mean
Give the mean of the data set (nearest tenth, if applicable):
Add the six elements and divide the sum by 6:
Example Question #2 : How To Find Mean
Find the mean of this set of numbers:
54, 41, 99, 120, 66.
Firrst, add the numbers:
Then, divide by the amount of numbers in the set:
Answer: The mean is 76.
Example Question #21 : Data Analysis And Probability
Give the mean of the following eight scores:
Divide the sum of the scores by eight:
Example Question #12 : Mean
Give the mean of the following nine scores:
Divide the sum of the scores by nine:
Example Question #13 : Mean
The average age of 4 people is 12. What will be the sum of their ages in 3 years?
The current sum of their ages is . Since all 4 people will gain 3 years in age, we have to add 12 to the current sum.
Example Question #5 : Mean
Give the mean of the following data set:
Since there are 16 elements, divide their sum by 16 to get the mean:
Example Question #11 : Mean
Find the average of this set of numbers:
521, 834, 754, 902, 899
First, add all the numbers in this set:
Divide, 3910 by the total amount of numbers in the set:
Answer: The average is 782.
Example Question #22 : Data Analysis And Probability
Find the mean in this set of numbers:
5570, 4886, 5226, 4120, 6561, 4120, 6008
First, add all the numbers in this set:
Then, divide that amount by the total number in the set:
Answer: The mean is 5213.
Example Question #2 : How To Find Mean
Find the average of this set of numbers:
2521, 2512, 2525, 2552, 2551, 2525, 2517
First, add all the numbers in this set:
Then, divide by the amount of numbers in the set:
Answer: The average is
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