#### 题目列表

The sum of the x positive measurements in list A is equal to the sum of the y positive measurements in list B. The average (arithmetic mean) of the x measurements in list A is greater than the average of the y measurements in list B.

x

#### Quantity B

y

Three machines, working independently, can make a production lot of widgets in 4, 6, and 8 hours, respectively. If the machines work simultaneously at their respective uniform rates to make a single lot, what fraction of the lot will be made by the fastest machine?
If x and y are positive integers and x + y = 8x + 22, which of the following must be true?
At a constant rate of $\frac{x}{6}$ miles for every y seconds, how many minutes would it take an aireraf to travel z miles? (xyz ≠ 0)
Sam purchased two pictures from an artist and sold each of them for $540. If Sam sold one of the pictures for 20 percent more than he paid for it and sold the other picture for 10 percent less than he paid for it, what was Sam's total profit on the two pictures? For which of the first five years shown was the total annual per capita consumption of coffee and ice cream combined closest to the annual per capita consumption of poultry? The population of the United States was approximately 106 million in 1920 and approximately 249 million in 1990. Based on these population estimates, approximately how many million pounds greater was the total annual consumption of cheese in 1990 than in 1920? Let a, b, and c represent the ranges of the annual per capita consumption of fresh vegetables, poultry, and ice cream, respectively, for the eight years shown. Which of the following statements is true? After taking a quiz, 25 students each received a score on the quiz that was an integer from 1 to 10, inclusive. The average (arithmetic mean) of the 25 scores was 8.8. Only 1 student received the lowest score, and the sum of the 24 scores greater than the lowest score was 217. What was the range of the 25 scores? $\frac{2}{9}$ < x < $\frac{1}{3}$ #### Quantity A x #### Quantity B $\frac{5}{18}$ P=$x^{30}-x^{31}$ #### Quantity A The value of P when x is $\frac{1}{2}$ #### Quantity B The value fo P when x is $-\frac{1}{2}$ $b_{1}$, $b_{2}$, $b_{3}$, ........., $b_{99}$, $b_{100}$........ The first term of the sequence shown is 1, and each term after the first term is equal to the preceding term multiplied by $-\frac{1}{3}$. #### Quantity A $b_{100}$ - $b_{99}$ #### Quantity B 0 The probability that event R will occur is 0.65. The probability that event T will occur is 0.47. #### Quantity A The probability that neither R nor T will occur #### Quantity B 0.47 SUVR is a rectangle. #### Quantity A $\frac{The lengh of ST}{The lengh of TU}$ #### Quantity B $\frac{The area of △RST}{The area of △TUV}$ The acreage of Hopetown, a town in Lewis County, is equal to 20 percent of the acreage of the region that is in Lewis County but not in Hopetown. #### Quantity A The acreage of Hopetown as a percent of the entire acreage of Lewis County #### Quantity B 18% r is a positive integer, k = 2r + 1, and h = 5k - 3. #### Quantity A The units digit of h #### Quantity B 2 Last week, the Garcia couple had combined earnings of$1,450. If one spouse earned \$1.25 per hour more than the other and both worked for 40 hours that week, what were last week's earnings of the spouse with the higher hourly pay?
A list of six numbers has a standard deviation of 0. A new list is created by increasing each number from the original list by 10 and then dividing each of the six results by 7. What is the standard deviation of the new list of six numbers?
The length of a diagonal of a square is greater than 12 but less than 13. Which of the following could be the perimeter of the square?
By approximately what percent did the stock price per share of Brand S coffee increase from January to December?

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