The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number.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? Select the correct option
A) 12
B) 18
C) 22
D) 24
E) 26
9 * 2= 
<gadget id="calculator">9 * 2</gadget>
<output>18</output>
18 years   18
<result>B</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The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number.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?