The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number. Find how much younger is the new member than the old number?  Choose the correct choice from the following options:
A) 27 years  B) 87 years  C) 18 years  D) 19 years  E) 16 years
9 * 2= 
<gadget id="calculator">9 * 2</gadget>
<output>18</output>
18 years   Answer: 18 years
<result>C</result>
The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number. Find how much younger is the new member than the old number?