GRE考满分·题库

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GRE考满分·题库

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题目内容
In a set of 500 numbers, the difference between the greatest and smallest number is 10

Quantity A

The average of the set of numbers

Quantity B

The range of the set of numbers
Set A includes all the odd integers from -50 to 50 (inclusive), while Set B includes all the integers from 10 to 30 (inclusive). If Set C is the intersection of Set A and Set B, then what`s the average of all the integers in Set C?
A group of parents and their kids bought both tickets and food at a theme park. The total number of parents is the same as the total number of kids. The ticket price for parents and kids is 20 and 10 dollars each, respectively. If they spent 420 dollars in total on tickets, and the ticket and food cost them 21 dollars on average, then how much did they spend on food in total?
______dollars
In a game, Mark could pick up either 2 point card or 4 point card. The average points of all the card he picks is 3.8.

Quantity A

The product when multiplying 9 and the number of times he picks up 2 point cards

Quantity B

The number of times he picks up 4 point cards

For the large cars sold at an auction that is summarized in the table above, what was the average sale price per car?
______dollars
The average score of n students used to be 70, yet 10 of them work harder and manage to increase their score by 5 each.

Quantity A

The new average score

Quantity B

72
In a quality-control test, 50 boxes-each containing 30 machine parts-were examined for defective parts. The number of defective parts was recorded for each box, and the average (arithmetic mean) of the 50 recorded numbers of defective parts per box was 1.12. Only one error was made in recording the 50 numbers: "1" defective part in a certain box was incorrectly recorded as "10".

Quantity A

The actual average number of defective parts per box

Quantity B

0.94
The 25 students in an English class took a literature test. Jovan, one of the 25 students,originally received a score on the test that was 6.2 points above the average (arithmetic mean) score for the 25 students. Each student was then given an opportunity to earn 10 additional points on the test by completing an extra project, and the average was then recalculated. If Jovan earned the 10 additional points and no other student earned additional points, Jovan's new score was how many points above the recalculated average score?
Among 20 separate classes, there are either 27 or 28 students in each class. The school now plans to open another separate class such that the average number of students of all the 21 classes is 0.5 less than the average of the original 20 classes. How many students are in the new class?
u, -2u, 3u, -4u, 5u, -6u, 7u (u is an integer)

Quantity A

The median of the above list of numbers

Quantity B

u
In a list of 15 numbers, 8 numbers are greater than 50.4, and 8 numbers are less than 54.6.

Quantity A

The median of the list of numbers

Quantity B

52.5
S is a set of n consecutive integers.

Quantity A

The mean of S

Quantity B

The median of S
What`s the median of a list of odd integers from 1 to 101 (inclusive)?
List S consists of the 25 integers between 14 and 88 that are multiples of 3. What is the median of the integers in S?

Quantity A

The median of all the prime numbers from 2 to 25, inclusive

Quantity B

The median of odd numbers from 2 to 25, inclusive

Quantity A

The average of all the multiples of 3 between 1 and 200

Quantity B

The average of all the multiples of 6 between 1 and 200
The average (arithmetic mean) of m and n is 1 more than k.

Quantity A

m+n

Quantity B

2k+1
1 < a < b < c < d < e < f

Quantity A

The median of a, c and e

Quantity B

The average of b, d and f
The average of three integers is 9, while the median is 8.
The smallest and largest number could be?
Indicate all such possible combinations.
A company has 40 employees. Among the 20 oldest, the youngest is aged at 30, and the average age is 36. Among the 20 youngest, the oldest is aged at 29, and the average age is 22.

Quantity A

The average age of the 40 employees

Quantity B

The median age of the 40 employees

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