1.

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.1. 26.5 years2. 28.5 years3. 29.5 years4. 27.5 years

Answer» Correct Answer - Option 4 : 27.5 years

Given:

Average age of 25 men = 28 years

Formula:

Average = Sum of all observations/Total number of all observation

Calculation:

Sum of age of 25 men = 28 × 25 = 700

If 5 men of average age of 25 years joined them, then

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 



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