The average age of a husband and his wife was 20 years at the time of their marriage. After five years they have a one-year old child. The average age of the family now is :
Answers:
A) 11
B) 18
C) 19
D) 287
E) 17
Explanation:   Sum of the present ages of husband, wife and child = (20 * 2 + 5 * 2) + 1= 
<gadget id="calculator">(20 * 2 + 5 * 2) + 1</gadget>
<output>51</output>
51 years.   Required average= (51/3)= 
<gadget id="calculator">(51/3)</gadget>
<output>17</output>
17 years.   Answer: 17) 17
<result>E</result>
The average age of a husband and his wife was 20 years at the time of their marriage. After five years they have a one-year old child. The average age of the family now is :