Question

The average age of 25 men is 28 years. 5 new men of an average age of 25 years joined them. Find the average age of all the men together.

• A. 26.5 years
• B. 28.5 years
• C. 29.5 years
• D. 27.5 years

Answer 1

Answer:

D. 27.5 years

Solution: Given: Average age of 25 men = 28 years Formula Used: Average = Sum of all observations/Total number of all observations Calculation: Sum of age of 25 men = 28 × 25 = 700 If 5 men of average age of 25 years joined them, Sum of age of 5 men = 25 × 5 = 125 years Now, Sum of age of 30 men = 700 + 125 = 825 years ⇒ Average age of 30 men = 825/30 = 27.5 years ∴ The average age of all the men together is 27.5 years.