Correct Answer - Option 2 : 23.75 years
Given:
The average of 5 family member is 25 years old.
The age of the youngest member of the family is 6 years.
Formula used:
Average = (Sum of total observations)/(Total number of observation)
Calculation:
Average = (Sum of total observations)/(Total number of observation)
⇒ (Sum of total observations) = Average × (Total number of observation)
Total sum of family = 5 × 25 = 125 years
Age of child is 6 years old, before his birth all 4 member of family are 6 years less than present age
So, New sum of age of family = 125 – 6 × 5 = 95 years
The required average = 95/4 = 23.75 years
∴ The required average is 23.75 years.
