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PREP07 Test 2 The 15 homes in a new development are each to be sold for one of three different prices so that the developer receives an average (arithmetic mean) of $200,000 per home. If 4 of the homes are to be sold for $170,000 each and 5 are to be sold for $200,000 each, what will be the selling price of each of the remaining 6 homes?
At the beginning of year 1, an investor puts p dollars into an investment whose value increases at a variable rate of $$x_n%$$per year, where n is an integer ranging from 1 to 3 indicating the year. If $$85\lt{x_n}\lt110$$ for all n between 1 and 3, inclusive, then at the end of 3 years, the value of the investment must be between
Four concentric circles share the same center. The smallest circle has a radius of 1 inch. For n greater than 1, the area of the nth smallest circle in square inches,$$A_{n} $$, is given by $$A_{n}=A_{n-1}+(2n-1) \pi $$ What is the sum of the areas of the four circles, divided by the sum of their circumferences, in inches?
Kyle has convinced his client to invest $10,000 in a mutual fund. Kyle projects gains of 20 percent for the first year and 10 percent for the second year. If at the end of the two year period, the value of mutual fund has actually decreased by 1 percent, what percent of the projected value of the investment was the actual value of the investment?
PREP07 Test 1 In the graduating class of a certain college, 48 percent of the students are male and 52 percent are female. In this class 40 percent of the male and 20 percent of the female students are 25 years old or older. If one student in the graduating class is randomly selected, approximately what is the probability that he or she will be less than 25 years old?
PREP07 Test 2 Over a certain time period, did the number of shares of stock in Ruth's portfolio increase? (1) Over the time period, the ratio of the number of shares of stock to the total number of shares of stocks and bonds in Ruth's portfolio increased. (2) Over the time period, the total number of shares of stocks and bonds in Ruth's portfolio increased.
PREP07 Test 1 In a certain year, the difference between Mary's and Jim's annual salaries was twice the difference between Mary's and Kate's annual salaries. If Mary's annual salary was the highest of the 3 people, what was the average (arithmetic mean) annual salary of the 3 people that year?(1) Jim's annual salary was $30,000 that year.(2) Kate's annual salary was $40,000 that year.
PREP07 Test 2 In a class of 30 students, 2 students did not borrow any books from the library, 12 students each borrowed 1 book, 10 students each borrowed 2 books, and the rest of the students each borrowed at least 3 books. If the average (arithmetic mean) number of books borrowed per student was 2, what is the maximum number of books that any single student could have borrowed?
PREP07 Test 2 During a car trip, Maria stopped to rest after she traveled 1/2 of the total distance to her destination. She stopped again after she traveled $$\frac{1}{4}$$ of the distance remaining between her first stop and her destination, and then she drove the remaining 120 miles to her destination. What was the total distance, in miles, from Maria's starting point to her destination?
PREP07 Test 1 At least 100 students at a certain high school study Japanese. If 4 percent of the students at the school who study French also study Japanese, do more students at the school study French than Japanese?(1) 16 students at the school study both French and Japanese.(2) 10 percent of the students at the school who study Japanese also study French.
Magoosh Students were given tokens to spend at a fair with various tents to visit. Each student was given 16 tokens. Some tents cost 3 tokens to enter, and some, 4 tokens. How many tents did Amelia visit?Statement #1: Amelia spent all of her tokens.Statement #2: Not all of the tents Amelia visited were the same token-price.
Magoosh Josh purchased several widgets for a total cost of $480. Every widget had the same price. What was the cost of 1 widget?(1) If the price of each widget had been $2.00 less, the total cost would have been $160 less.(2) If the price of each widget had been $1.50 more, the total cost would have been 25 percent more.
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The number of cars present at a particular time was measured at 3,999 different locations on Tuesday and on Wednesday. The number of locations that had more cars on Wednesday was 15% higher than the number of locations that had more cars on Tuesday. No location had the same number of cars on both days. How many of the locations had more cars on Tuesday?
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Homeowners aged 30 to 40 are more likely to subscribe to a newspaper and are more likely to receive both the daily print and electronic versions than are members of any other demographic group. The popular belief that senior citizens are the age group best informed about current events must, therefore, be false.

The argument is flawed primarily because the author
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As years of harsh winter storms have begun to force the overhaul of some components of the subway line, officials are seeing the necessary maintenance as a springboard to more comforts in the trains’ interiors and adding twenty new subway cars to the manufacturing order, even though many of the current cars are still fully operational.
300难题 Exactly 3 deposits have been made in a savings account and the amounts of the deposits are 3 consecutive integer multiples of $7. If the sum of the deposits is between $120 and $170, what is the amount of each of the deposits? 1.The amount of one of the deposits is $49. 2.The amount of one of the deposits is $63.
300难题 Three dice, each with faces numbered 1 through 6, were tossed onto a game board. If one of the dice turned up 4, what was the sum of the numbers that turned up on all three dice? 1.The sum of two of the numbers that turned up was 10. 2.The sum of two of the numbers that turned up was 11
OG21 OG20 OG2022 A certain computer company produces two different monitors, P and Q. In 2010, what was the net profit from the sale of the two monitors? (1) Of the company's expenses in 2010, rent and utilities totaled $500,000. (2) In 2010, the company sold 50,000 units of monitor P at $300 per unit and 30,000 units of monitor Q at $650 per unit.
190310 The cost of each table is $50. The cost of each chair is $5. The profit of the table is 30% of the cost. The profit of the chair is 50% of the cost. A furniture store sold five times as many chairs as tables. The total profit on tables and chairs was $550. What's the total price of the tables and chairs sold?
OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022 Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technologies powered by electricity. It is thus evident that less fossil fuel is being used as a result of the operations of these industries than would have been used if these industries had retained their older technologies.Which of the following, if true, most strengthens the argument above?