In a team of 12 boys the average age of 6 boys is 15 years and the average age of the other 6 boys is 17 years old. What is the average age of the whole team?
To find the average age of the whole team, first find the total age of all 12 boys.
The total age of the first 6 boys is: 6 x 15 = 90 years
The total age of the other 6 boys is: 6 x 17 = 102 years
The total age of the whole team is: 90 + 102 = 192 years
To find the average age of the whole team, divide the total age by the total number of boys:
Average age = Total age / Number of boys
Average age = 192 / 12 = 16 years
Therefore, the average age of the whole team is 16 years old.