The average age of a group of 10 people increases by 1.5 years when a person aged 25 is replaced by a new person. Find the age of the new person.

Explanation

Given: ​ Number of people (n) = 10 Increase in average = 1.5 years Age of replaced person = 25 Concept Used: New Age = Old Age + (Number of People × Increase in Average) Solution: Total increase in age = 10 × 1.5 = 15 years Age of New Person = 25 + 15 Age = 40 Final Answer 40​