David was born 5 years after his father's marriage. His mother is 4 years younger than his father but 20 years older than David who is 8 years old. At what age did the father get married ? Choose the correct answer: A) 19 years B) 20 years C) 21 years D) 18 years E) 17 years
Explanation:   David's present age = 8 years.   His mother's present age = (20 + 8)= 
<gadget id="calculator">(20 + 8)</gadget>
<output>28</output>
28 years.   His father's present age= (28 + 4)= 
<gadget id="calculator">(28 + 4)</gadget>
<output>32</output>
32 years.   His father's age at the time of David's birth= (32 - 8)= 
<gadget id="calculator">(32 - 8)</gadget>
<output>24</output>
24 years.   Therefore David's father's age at the time of marriage= (24 - 5)= 
<gadget id="calculator">(24 - 5)</gadget>
<output>19</output>
19 years.   19 yearsnswer: 19 years
<result>A</result>
David was born 5 years after his father's marriage. His mother is 4 years younger than his father but 20 years older than David who is 8 years old. At what age did the father get married ?