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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 from 8 to 44, inclusive

Quantity B

The standard deviation of all the odd integers from 59 to 95, 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
If a set S has a total of 6 subsets that consist of 2 members each, then S consists of how many members?
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 haven`t 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.
What's the number of integers that are neither multiple of 3 nor multiple of 7 from 1 to 1000, inclusive?
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. What`s the greatest possible number of students who selected both courses?
In a class, there are 3/4 of people taking chemistry class, and there are 5/6 of people taking biology class. It is possible that a student takes neither of them. What is the minimum ratio of people taking both these classes?
Give your answer as a fraction.
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?
Brad and Paula were each given a copy of the same list of 20 songs, and they were asked to mark the songs that they liked. Brad marked 15 songs and Paula marked 12 songs. Which of the following CANNOT be the number of songs that they both marked?
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

$$\frac{1}{6}$$
There are 210 students in a class. 160 of them take physics, 80 of them take chemistry, and 60 of them take biology. Each student has to take at least one courses. but cannot take all the three classes simultaneously. The number of students who take two classes is what percent of all the students?
Give your answer as a fraction.
Dr. Mosher call the roll ten days in a row. If Candy attended 8 times, Sam attended 7 times, and Amy attended 6 times. If they show in class simultaneously in only one day, and at least 1 student attend each day`s course, how many days in which exactly two of them attended?

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