If anyone could please help on this average question.
Mention the ages of your any 10 relatives. Find the average age of these 10 relatives. If average age of your 2 teachers is 55 years. Also find the average age of all these 12 people.
The average of all 12 people will be the sum of all the ages divided by 12. We can get the sum of the ages of the two teachers by taking the average age (55 years) and multiplying by 2: 110 years. So