What do you understand by average age? What is the relationship between half-life and average age? , 12 | Structure of nucleus: Red...

The average age of 12 boys is 15 years and the average age of 18 girls is 12 years .What is the conbined average age of the boys and girls ,taken together ?

The average age of 50 teachers of a school is 66 years and the average age of 60 teachers of another school is 55 years. What will be average age of teachers of both the schools together?

If the average age of 30 students is 40, what will be the average age of students, if age of each student is divided by 2?

The average age of Sachin and Gangili is 35 years if Kaif replaces Sachin the average age become 32 years and if Kaif replaces Ganguli then the average age becomes 38 years if the average age of Dhoni and Irfan is be half of the average age of Sachin Ganguli and Kaif then the average age of the five people is: