In a group of 12 students, the average age is increased by 2 years when three of them are replaced by 5 students, and the total age increased by 50 years. Then what is the sum of their ages?
Reveal answer
Fill a bubble to check yourself
Keep practicing — related questions
- The average age of 41 students of a class is 15 years. When one boy leaves the class, the average is reduce...
- When a man weighing 75 kg is replaced by another man in a group of 20 persons, the average weight decreases...
- The average age of a family of 9 members is 26 years. If the youngest member of the family is 10 years old,...
- The average marks of 22 students in section A of class 9 are 52, that of 23 students of section B are 50 an...
- Arrange the following into increasing source of total irrigated area to decreasing source of total irrigate...
- Which three are methods of the Object class? 1. notify(); 2. notifyAll(); 3. isInterrupted(); 4. synchroniz...
- Which three are valid method signatures in an interface? 1. private int getArea(); 2. public float getVol(f...
- Consider the following statements: 1. Except mammals and reptiles, no other animal group has the unique arr...