Three years ago the average age of a family of 4 members was 19 years. A boy have been born, the average age of the family is the same today. What is the age of the boy?
Choose the correct answer
A) A)7
B) B)6
C) C)5
D) D)4
E) E)3
4 * 22= 
<gadget id="calculator">4 * 22</gadget>
<output>88</output>
88   5 * 19= 
<gadget id="calculator">5 * 19</gadget>
<output>95</output>
95   --------------   7   7nswer: 7
<result>A</result>
Three years ago the average age of a family of 4 members was 19 years. A boy have been born, the average age of the family is the same today. What is the age of the boy?