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Magoosh A box contains 4 red chips and 2 blue chips. If two chips are selected at random without replacement, what is the probability that the chips are different colors?
Magoosh In a certain game, you perform three tasks. You flip a quarter, and success would be heads. You roll a single die, and success would be a six. You pick a card from a full playing-card deck, and success would be picking a spades card. If exactly one of these three tasks is successful, then you win the game. What is the probability of winning the game?
Magoosh GMAT、gmat题库、gmat模考、gmat考满分In the diagram above, angle C = 90º and AC = BC. Point M is the midpoint of AB. Arc AXB has its center at C, and passes through A and B. Arc AYB has its center at M and passes through A and B. The shaded region between the two arcs is called a "lune." What is the ratio of the area of the lune to the area of triangle ABC?
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If , what is the units digit of ?
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For which of the following values of k is \tfrac{k+20}{k} NOT an integer?
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A certain tailor shop employs 10 workers who can normally complete an industrial order in 112 days; however, the shop is prone to power outages, and each outage results in the loss of a full day of work. After 61 days working on a particular industrial order, the shop had had 5 power outages. At the beginning of the 62nd day of work, in order to make up for the outages, the management hired 4 new workers who work at the same pace as the other employees. In the end, the order took 105 days to complete. How many power outages did the tailor shop have after it brought on the new workers?
If each of the following fractions were written as a repeating decimal, which would have the longest sequence of different digits?
应用题 A total of 30 percent of the geese included in a certain migration study were male. If some of the geese migrated during the study and 20 percent of the migrating geese were male, what was the ratio of the migration rate for the male geese to the migration rate for the female geese?[Migration rate for geese of a certain sex = (number of geese of that sex migrating) / (total number of geese of that sex)]
There are 8 magazines lying on a table; 4 are fashion magazines and the other 4 are sports magazines. If 3 magazines are to be selected at random from the 8 magazines, what is the probability that at least one of the fashion magazines will be selected?
If x = kc and y = kt, then y - x =
In a survey of 348 employees, 104 of them are uninsured, 54 work part time, and 12.5 percent of employees who are uninsured work part time. If a person is to be randomly selected from those surveyed, what is the probability that the person will neither work part time nor be uninsured?
Which of the following is the smallest?
A car painting shop had a cubic painting chamber of 1000 cubic meters in volume. When a new and bigger car model was introduced, a parallelepiped section was added to a side of the painting chamber, which added fifty percent more volume to the original volume of the chamber. What are the dimensions in meters of the section added?
300难题 The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that includes a tax, or both?
181215 There are 64 unit cubes in total. Only one side of each cube is painted. These unit cubes will be put together into a big cube. What's the maximum proportion of painted sides on the surface of the big cube?
181215 There are three red balls and six white balls in the box A. There are 4 red balls and 7 white balls in the box B. A ball was taken out from box A randomly and put into box B. What's the probability of taking out a red ball from box B?
190113 还原机经选题: 文字题&几何 There are 64 identical cubes with side of 1. Only one face of each cube is painted. These 64 cubes will be put together into a big cube. What's the maximum proportion of painted sides on the surface of this big cube?
190207 There are three colors of candy in an opaque bag, including two white candy, three red candy and one blue candy. Two candies will be taken out randomly from this bag. What's the probability of taking at least one white candy?
190407 All the students in a class can sing or dance. The number of students who can both sing and dance is one fifth of those who can sing and one fourth of those who can dance. How many times as many students can only sing as those can only dance?
模考带练机经题 If $$k_1$$=200,and $$k_n$$=200+0.2 $$k_{n-1}$$(k ≥ 2) ,the value of $$k_{40}$$ is between?