After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago.What is the difference between the ages of the replaced and the new member? Select
A) 2 years  B) 4 years  C) 8 years  D) 15 years  E) 25 years
the age 5 members will be 13,14,15,16 and 17   3 years before there age was 10,11,12,13 and 14 hence the average is 12(10+11+12+13+14/5=60/5= 
<gadget id="calculator">60/5</gadget>
<output>12</output>
12).   now if the oldest man 17 is replaced by 2 the the average is become same as three years ago the are .   as (13+14+15+16+2)/5= 60/5= 
<gadget id="calculator">60/5</gadget>
<output>12</output>
12.   hence the difference between the ages of the replaced and the new member is  17-2= 
<gadget id="calculator"> 17-2</gadget>
<output>15</output>
15.   ANSWER:15 years
<result>D</result>
After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago.What is the difference between the ages of the replaced and the new member?