#### 题目列表

Five points lie on line y=5x+30. If the standard deviation of all the x-coordinates of the five points is 4.6, then what is the standard deviation of all the y-coordinates of the five points?
Set A={12, 13, 16, 19, 20}
Set B={12, 15, 16, 17, 20}

#### Quantity A

The standard deviation of numbers in Set A

#### Quantity B

The standard deviation of numbers in Set B

Set A={500, 600, 700, 900, 1200}
Set B={500, 600, 800, 900, 1200}
Quantity A: The standard deviation of numbers in Set A
Quantity B: The standard deviation of numbers in Set B

#### Quantity A

The standard deviation of all the even integers between 8 and 44 (inclusive)

#### Quantity B

The standard deviation of all the odd integers between 23 and 59 (inclusive)

A normal distribution of variable X has a mean of 56 and a standard deviation of 4.

#### Quantity A

The percentage of variable X ranging from 60 to 62

#### Quantity B

The percentage of variable X ranging from 62 to 64

There are 45 students in a class. 23 students take math course, and 28 students take science course, while 7 students take neither of them. How many students take both math and science courses?
On a boat of 2,500 passengers, 1,250 of them have been to Paris, while 900 of them have been to London. If 30% of all passengers have been to both cities, then how many passengers havent been to either of the two cities?
In a company, 54.6% of employees regard salary as the most important incentive, 47% of employees regard promotion as the most important incentive, while 30% of employees regard both incentives as important. What percentage of employees regard neither incentive as important?
____%
In a survey of preference of pets, 40% of respondents prefer dogs, and 30% of respondents prefer cats. If 40% of respondents prefer neither dog nor cat, what percent of respondents prefer both dog and cat?
In a survey of 68 respondents over their pets (each of them owns at least a dog or a cat), 48 own dogs, and 34 own cats. How many respondents own cats but not dogs?
In a group of 50 students, 20 students join club A. Which of the following statements individually can determine the number of students who do not join club A but join club B?
Indicate all such statements.
In a class, 40 students speak Spanish, while 30 students speak French. If half of students who speak Spanish do not speak French, how many students can only speak French?
80% of all polygons are hexagon, and 20% of these hexagons are regular hexagons.

#### Quantity A

The percent of polygons that are neither hexagons nor regular polygons

#### Quantity B

16%

Among 60 students, 30 selected Course A, 50 selected Course B. Whats the greatest possible number of students who selected both courses?
500 respondents are asked two questions each and could answer only yes and no. 440 respondents said yes to the first question. 220 respondents said yes to the second question. At least how many respondents said yes to both questions?
A list contains 20 songs, Mike and Scott got the identical list. Mike marked 15 favorite songs, and Scott marked 12 songs. Which of the following cannot be the number of songs they both marked as favorite?
In a company, $\frac{1}{3}$ of employees are female, $\frac{1}{2}$ of employees have college degrees.

#### Quantity A

The percentage of female employees who also have college degrees among all employees

#### Quantity B

$\frac{1}{6}$

In a sequence, for any integer n greater than 1, $a_n$ is greater than its preceding term by 3 and $a_{17}$ is 55.

#### Quantity A

$a_{98}$

#### Quantity B

300

What is the value of 6+12+18+24+-+294+300, where each term is a multiple of 6?
The number of bacteria A and B at 08:00 AM is both 5,000. The number of bacteria A doubles every hour, while the number of bacteria B increases by 50% every hour

#### Quantity A

The number of bacteria A by 2:00 PM in the same day

#### Quantity B

The number of bacteria B by 2:00 PM in the same day

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