1.
A class has 20 boys and 30 girls. The average score of boys in a math test is 80, and the average score of girls is 90. What is the weighted average score of the entire class?
2.
John bought 2 kg of apples at \$5 per kg and 3 kg of oranges at \$4 per kg. What is the average price per kilogram of the fruits he bought?
3.
A student’s grade is calculated as follows: homework is 40%, tests are 50%, and participation is 10%. If their scores are 85, 90, and 80 respectively, what is their final weighted grade?
4.
A company has two teams with average salaries: Team A has 10 employees with an average salary of \$50,000, and Team B has 20 employees with an average salary of \$60,000. What is the average salary of all employees in the company?
5.
A car dealership sells two models: Model A and Model B. Model A accounts for 40% of the sales, and Model B accounts for 60%. If the price of Model A is \$25,000 and Model B is \$30,000, what is the average price of all cars sold?
6.
In a survey, 40% of participants preferred Product X, 30% preferred Product Y, and 30% preferred Product Z. The satisfaction ratings for each product are 80%, 90%, and 85% respectively. What is the overall satisfaction rating for the survey?
7.
A company has two departments. The Sales Department has 50 employees with an average salary of \$45,000, and the Marketing Department has 30 employees with an average salary of \$55,000. What is the overall average salary of all employees?
8.
A car travels the first 60 miles of a trip at 30 miles per hour and the next 120 miles at 60 miles per hour. What is the car's average speed for the entire trip?
9.
A factory blends two types of oil. Type A costs \$3 per liter, and Type B costs \$5 per liter. What is the average price (price per liter) of the 20 liters of the mixture if the factory blends 12 liters of Type A with 8 liters of Type B?
10.
A chemist has two solutions: Solution A has 10% salt, and Solution B has 20% salt. How much of each solution should be mixed to create 12 liters of a solution with 15% salt?
