The average age of a group of 5 members is 20 years. Two years later, a new member joins the group. The average age of the group becomes 21.5 years. What is the age of the new member ?  Choose the correct choice from the following options:  A) 20 years  B) 19 years  C) 22 years  D) 23 years  E) 24 years
The average age of the 5 members is 20 years   =&gt; The sum of the ages of the 5 members is 20*5= 
<gadget id="calculator">20*5</gadget>
<output>100</output>
100 years   Once the new member joins, the average age becomes 21.5 years.   Let the age of the new member be x.   Then (110+x)/6= 21.5   =&gt; x = 19 years   Answer 19 years
<result>B</result>
The average age of a group of 5 members is 20 years. Two years later, a new member joins the group. The average age of the group becomes 21.5 years. What is the age of the new member ?