Three years ago the average age of a family of nine members was 23 years. A boy have been born, the average age of the family is the same today. What is the age of the boy? Select the correct option.
A) A)4 B) B)5 C) C)6 D) D)7 E) E)8
9 * 26= 
<gadget id="calculator">9 * 26</gadget>
<output>234</output>
234   10 * 23= 
<gadget id="calculator">10 * 23</gadget>
<output>230</output>
230   --------------   4   4nswer: 4
<result>A</result>
Three years ago the average age of a family of nine members was 23 years. A boy have been born, the average age of the family is the same today. What is the age of the boy?