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比率、比例与百分比   题数:173
Linda, Robert, and Pat packed a certain number of boxes with books. What is the ratio of the number of boxes of books thatRobert packed to the number of boxes of books that Pat packed?(1) Linda packed 30 percent of the total number of boxes of books.(2) Robert packed 10 more boxes of books than Pat did.
At a certain theater, the cost of each adult's ticket is $5 and the cost of each child's ticket is $2. What was the average (arithmetic mean) cost of all the adults' and children's tickets sold at the theater yesterday?(1) Yesterday the ratio of the number of children's tickets sold at the theater to the number of adults' tickets sold at the theater was 3 to 2.(2) Yesterday 80 adults' tickets were sold at the theater.
How many of the 42 people in a group are employed students?(1) 29 of the 42 people are employed. (2) 24 of the 42 people are students.
What was a certain company's revenue last year? (1) Last year the company's gross profit was $4,100.(2) Last year the company's revenue was 50 percent greater than its expenses.
In 1984 a certain union had a total of 15,600 members. Was the percent increase in the total number of members in the union from 1984 to 1985 greater than that from 1985 to 1986 ? (1) From 1984 to 1985 the total number of members in the union increased by 781, and from 1985 to 1986 the total number of members in the union again increased by 781. (2) In 1985 the union had a total of 16,381 members, and in 1986 the union had a total of 17,162 members.
On a certain sight-seeing tour, the ratio of the number of women to the number of children was 5 to 2. What was the number of men on the sight-seeing tour? (1) On the sight-seeing tour, the ratio of the number of children to the number of men was 5 to 11.(2) The number of women on the sight-seeing tour was less than 30.
A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more video cameras in 1995 than in 1994. If the manufacturer produced 1,000 video cameras in 1993, how many video cameras did the manufacturer produce in 1995 ?(1) xy = 20(2) x + y + xy100 ​= 9.2
Henry purchased 3 items during a sale. He received a 20 percent discount off the regular price of the most expensive item and a 10 percent discount off the regular price of each of the other 2 items. Was the total amount of the 3 discounts greater than 15 percent of the sum of the regular prices of the 3 items? (1) The regular price of the most expensive item was $50, and the regular price of the next most expensive item was $20. (2) The regular price of the least expensive item was $15.
If the drama club and music club are combined, what percent of the combined membership will be male?(1) Of the 16 members of the drama club, 15 are male.(2) Of the 20 members of the music club, 10 are male.
The annual rent collected by a corporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998. Was the annual rent collected by the corporation from the building more in 1999 than in 1997?(1) x > y(2) xy/100< x-y
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