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PREP07 Test 1	A certain junior class has 1,000 students and a certain senior class has 800 students.Among these students, there are 60 sibling pairs, each consisting of 1 junior and 1 senior.If 1 student is to be selected at random from each class, what is the probability that the 2 students selected will be a sibling pair?
PREP07 Test 1 GWD	The population of India has been steadily increasing for decades, and it will probably have what is estimated as 1.6 billion people by 2050 and surpass China as the world's most populous nation.
PREP07 Test 1	. A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors:blue, green, yellow, or pink. The store packs the notepads in packages that contain either 3 notepads of the same size and the same color or 3 notepads of the same size and of 3 different colors. If the order in which the colors are packed is not considered, how many different packages of the types described above are possible?
PREP07 Test 1	If P, Q, and R are points on the number line, what is the distance between P and R ?(1) Q is between P and R.(2) The distance between P and Q is 5.
PREP07 Test 1	If x is positive, what is the value of y ?(1) 5x = 15(2) xy + y = 18
PREP07 Test 1	It was only after Katharine Graham became publisher of The Washington Post in 1963 that it moved into the first rank of American newspapers, and it was under her command that the paper won high praise for its unrelenting reporting of the Watergate scandal.
PREP07 Test 1	. For a certain examination, a score of 58 was 2 standard deviations below the mean,and a score of 98 was 3 standard deviations above the mean. What was the mean score for the examination?
PREP07 Test 1	The figure shows seven train stations and the distances, in miles, along the railways that connect these stations. Beginning at one of the stations, a train takes 25 hours to travel directly to station W at an average rate of 50 miles per hour. At which of the stations did the train begin?
PREP07 Test 1	Due to automobile-related jobs in the 1920's employing one of every eight workers, the automobile industry dominated the American economy.
PREP07 Test 1	A contractor combined x tons of a gravel mixture that contained 10 percent gravel G, by weight, with y tons of a mixture that contained 2 percent gravel G, by weight, to produce z tons of a mixture that was 5 percent gravel G, by weight. What is the value of x ?(1) y = 10(2) z = 16
PREP07 Test 1	Like any star of similar mass would do, once the Sun has exhausted the hydrogen in its core, it expands into a red giant, eventually ejecting its outer envelope of gases to become a white dwarf.
PREP07 Test 1	Which of the following is closest to the value of $${999}\over{100+{\frac{1}{999}}}$$?
PREP07 Test 1	How many of the students in a certain class are taking both a history and a science course?(1) Of all the students in the class, 50 are taking a history course.(2) Of all the students in the class, 70 are taking a science course.
PREP07 Test 1 PREP07 Test 1	When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.
PREP07 Test 1	A vending machine is designed to dispense 8 ounces of coffee into a cup. After a test that recorded the number of ounces of coffee in each of 1,000 cups dispensed by the vending machine, the 12 listed amounts, in ounces, were selected from the data. If the 1,000 recorded amounts have a mean of 8.1 ounces and a standard deviation of 0.3 ounce, how many of the 12 listed amounts are within 1.5 standard deviations of the mean?
PREP07 Test 1	Pat bought 5 pounds of apples. How many pounds of pears could Pat have bought for the same amount of money?(1) One pound of pears costs $0.50 more than one pound of apples.(2) One pound of pears costs $$1\frac{1}{2}$$ times as much as one pound of apples.
PREP07 Test 1	Jill, who lives in City C, plans to visit 3 different cities, M, L, and S. She plans to visit each city exactly once and return to City C after the 3 visits. She can visit the cities in any order. In how many different orders can she visit the 3 cities?
PREP07 Test 1	Surveys have shown that in up to 40 percent of elderly people living independently in affluent countries, the consumption of one or more essential nutrients is insufficient or they have deficient levels of these nutrients in their blood.
PREP07 Test 1	During a 40-mile trip, Marla traveled at an average speed of x miles per hour for the first y miles of the trip and at an average speed of 1.25x miles per hour for the last 40 - y miles of the trip. The time that Marla took to travel the 40 miles was what percent of the time it would have taken her if she had traveled at an average speed of x miles per hour for the entire trip?(1) x = 48(2) y = 20
PREP07 Test 1	According to two teams of paleontologists, recent fossil discoveries in Pakistan show that whales, porpoises, and dolphins are more closely related to some of the oldest known even-toed ungulates--a group of hoofed mammals that today includes cows, camels, pigs, and hippos--than to any other mammals.