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题目内容
Students in a school are either graduate or undergraduate，if 60% of the students are graduate，30% of the graduate are majoring in engineering，and 40% of undergraduate are majoring in engineering, what percent of the engineering-students are graduate？

Give your answer to the nearest 0.01 percent.

_____%
The fee of tuition plus accommodation is 42,000 this year, which is 5% higher than last year. Specifically, the accommodation fee increases by 2% and reaches 10,200 this year. If so, by what percent does the tuition increase from last year to this year?

Give your answer as a percent.

_____%
The price of B is 20% greater than the price of A,and the price of A is 15% less than the price of C. If the price of C is $1.38,the price of B is what percentage higher than the price of C?

Give your answer as a percent.
A person sold his one house at the price which is 20% less than the price he bought it, and he sold his another house at the price which is 20% more than the price he bought it, and the two houses were sold at the same prices,$192000. Then what percent is the sum of the prices he bought the two houses before more than $384,000?

Give your answer to the nearest hundredths of a percent.
M company consists of A and B two divisions, M`s income is 42000, and it`s 5% higher than last year. Division A`s income is 10200, and it`s 2% higher than last year. What percent did B increase than last year?

Give your answer as a percent.

_____%
In the first year, the sales of a store is a. Its sales increase by x% every two years, and reach 1.4a in the fifth year.

Quantity A

x

Quantity B

20
The principal a decreased by x% (10 < x < 40) in the first year, and then decreased by x% in the second year.

Quantity A

The amount of the remaining money

Quantity B

a (1- $$\frac{2x}{100}$$)
A becomes 40% greater than before, and B becomes 20% less than before, what is the ratio of the new ratios of A:B to the original ratio of A:B?

Give your answer in fraction.
A shoe store has a discount of 20% to 40%. If the original price of the shoes is 59.5$, which of the following could be the selling price?

Indicate all such measures.
On October 1, 2006, at a certain elementary school, the ratio of the number of students to the number of teachers was 34 to 1. By October 1, 2007, the number of students had increased by 5 percent and the number of teachers had increased by 2 percent from the previous year. What was the ratio of the number of teachers to the number of students at the school on October 1, 2007 ?

Give your answer as a fraction.
An item was discounted by 20%, and the reduced price was discounted by 40%, what percentage did the original price discount off?

Give your answer as a percent.
In the first year, the sales of a store is x dollars.

In the second year, its sales increase by 10% than the first year.

In the third year, its sales drops by 5% than the second year.

Quantity A

The percent increase/decrease of the store in the third year than the first year

Quantity B

5%
The price of a product was a in 2001, the price increased 10% in 2002, and then decreased 5% in 2003.

Quantity A

The percent increase (or decrease) from 2001 to 2003

Quantity B

5%
In an organization that has boys and girls, if the number of boys and of girls decreases by the same amount simultaneously, there will be fewer boys than girls.

Quantity A

The percentage of decrease in the number of boys

Quantity B

The percentage of decrease in the number of girls

Quantity A

0.8 minutes less than 0.08 hour

Quantity B

4 minutes
The average speed of a car is 104km/h,then what is the speed per hour in terms of mile?(1mile=1.6km)
At 12:00 the water in a tank started to go out through one outlet with the speed of 120 liters per minute. At 14:00 another outlet was opened, and altogether 250 liters of water went out per minute through all these two outlets, and the water tank was totally drained at 16:30. Then how many liters of water was there in the tank at 12:00?
The speed of a car is 90 kilometers per hour. Which of the following must be true? (1mile=1.603 kilometers, 1foot=0.304 meters)
An American paid $100 for an item in country D and got the change in 1000 D bills. Which of the following statements individually provide(s) sufficient additional information to determine how many dollars the item is?

Indicate allsuch statements.
To fill a pool, A need to work alone for 12 minutes and B needs to work alone for 20 minutes. How many minutes will it take if A and B work together?

Give your answer as a decimal.

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