The total of the ages of Amar, Akbar and Anthony is 30 years. What was the total of their ages three years ago ? Choose the correct answer:	A) 20 years	B) 28 years	C) 71 years	D) 21 years	E) 31 years
Explanation:   Required sum = (30 - 3 x 3) years = (30 - 9)= 
<gadget id="calculator">(30 - 9)</gadget>
<output>21</output>
21 years.   Answer: Option 21 years
<result>D</result>
The total of the ages of Amar, Akbar and Anthony is 30 years. What was the total of their ages three years ago ?