user: [Question]At a CD store, 40% of the CDs cost $10 each, and the rest cost $5 each. Prince bought half the CDs sold at $10 each, and all of the CDs sold at $5 each. If the total number of CDs was 200, how much money did Prince spend on buying the CDs?
[Answer]The number of CDs selling at $10 each at the store is 40 / 100 * 200 = 80. This means the store sells 200 - 80 = 120 CDs at $5 each. Prince bought 1 / 2 * 80 = 40 of the CDs selling at $10 each. The total amount of money Prince paid for the 40 CDs selling at $10 each is $40 * 10 = $400. If he bought all the CDs selling at $5 each, he paid a total of $5 * 120 = $600. For all the CDs he bought, Prince spent $600 + $400 = $1000. The answer is 1000.
Q: A yearly book sale is held in school where students can sell their old books at a cheaper price. Two-fifths of Lovely's books can be sold for $2.50 each and the rest for $2 each. How much will Lovely earn if all 10 books were sold?
A: Lovely will sell 10 x 2 / 5 = 4 books for $2.50 each. She will sell 10 - 4 = 6 books for $2 each. Her earnings for the 4 books at $2.50 will be $2.50 x 4 = $10. Her earnings for the 6 books for $2 each will be $2 x 6 = $12. Thus, Lovely's total earning if all 10 books are sold is $10 + $12 = $22. The answer is 22.
Question: Mark is buying asphalt to pave a new section of road. The road will be 2000 feet long and 20 feet wide. Each truckload of asphalt will cover 800 square feet of road. If each truckload costs $75, and there's a 20% sales tax, how much will Mark need to pay for asphalt?
Answer: First, calculate how many square feet of road Mark needs to cover by multiplying the length by the width: 2000 feet * 20 feet = 40,000 sq ft. Then divide the square footage of road by the number of square feet each truckload will cover: 40,000 sq ft / 800 sq ft / truckload = 50 truckloads. Now multiply the number of truckloads by the cost per truckload: $75 / truckload * 50 truckloads = $3750. Now calculate the sales tax by multiplying $3750 by 20%: $3750 * .2 = $750. Now add the sales tax to the cost of the asphalt to find the total: $750 + $3750 = $4500. The answer is 4500.
[Question]The teacher divided the students into four groups. One group had 5 students, another 8 students, and the third 7 students. If there were 24 total students, how many students were in the fourth group?
[Answer]There are 5 + 8 + 7 = 20 students in the first three groups. There are 24 - 20 = 4 students in the fourth group. The answer is 4.
Q: At a birthday party, 30% of the guests are married, 50% are single, and the rest are children. If there are 1000 guests, how many more married people are there than children?
A: There are 1000 x 30 / 100 = 300 people who are married. There are 1000 x 50 / 100 = 500 people who are single. So, there are a total of 300 + 500 = 800 that are either married or single. This means, 1000 - 800 = 200 are children. Therefore, there are 300 - 200 = 100 more married people than children. The answer is 100.
Question: In a certain school, 2/3 of the male students like to play basketball, but only 1/5 of the female students like to play basketball. What percent of the population of the school do not like to play basketball if the ratio of the male to female students is 3:2 and there are 1000 students?
Answer:

assistant: The students are divided into 3 + 2 = 5 parts where 3 parts are for males and 2 parts are for females. Each part represents 1000 / 5 = 200 students. So, there are 3 x 200 = 600 males. And there are 2 x 200 = 400 females. Hence, 600 x 2 / 3 = 400 males play basketball. And 400 x 1 / 5 = 80 females play basketball. A total of 400 + 80 = 480 students play basketball. Therefore, 1000 - 480 = 520 do not like to play basketball. The percentage of the school that do not like to play basketball is 520 / 1000 * 100 = 52. The answer is 52.