The total of the ages of four persons is 86 years. What was their average age 4 years ago?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 17.5 year.
Total ages of four persons = 86 years
Average ages of four persons = 86 ÷ 4 = 21.5 years
4 years ago average ages of four persons = 21.5 - 4 = 17.5 years