The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number.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) 7 yrs	B) 10 yrs	C) 18 yrs	D) 20 yrs	E) 25 yrs
Explanation:   9 * 2= 
<gadget id="calculator">9 * 2</gadget>
<output>18</output>
18 years   ANSWER 18 yrs
<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The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number.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?