John was born 8 years after his father's marriage. His mother is 4 years younger than his father but 25 years older than John who is 15 years old. At what age did the father get married ?  Choose the correct choice from the following
A) 18 years  B) 20 years  C) 22 years  D) 24 years  E) 21 years
Explanation:   John's present age = 15 years.   His mother's present age = (25 + 15)= 
<gadget id="calculator">(25 + 15)</gadget>
<output>40</output>
40 years.   His father's present age= (40+ 4)= 
<gadget id="calculator">(40+ 4)</gadget>
<output>44</output>
44 years.   His father's age at the time of John's birth= (44 - 15)= 
<gadget id="calculator">(44 - 15)</gadget>
<output>29</output>
29 years.   Therefore John's father's age at the time of marriage= (29 - 8)= 
<gadget id="calculator">(29 - 8)</gadget>
<output>21</output>
21 years.   Answer: 21 years
<result>E</result>
John was born 8 years after his father's marriage. His mother is 4 years younger than his father but 25 years older than John who is 15 years old. At what age did the father get married ?