The average age of a group of 12 students was 20. The average age increased by 2 years when two new students joined the group. What is the average age of the two new students who joined the group?
Choose the correct choice from the following answers:
A) 22 years
B) 30 years
C) 34 years
D) 32 years
E) None of these
Answer   The average age of a group of 12 students is 20.   Therefore, the sum of the ages of all 12 of them = 12 * 20= 
<gadget id="calculator">12 * 20</gadget>
<output>240</output>
240   When two new students join the group, the average age increases by 2.   New average= 22.   Now, there are 14 students.   Therefore, the sum of the ages of all 14 of them = 14 * 22= 
<gadget id="calculator">14 * 22</gadget>
<output>308</output>
308   Therefore, the sum of the ages of the two new students who joined= 308 - 240= 
<gadget id="calculator">308 - 240</gadget>
<output>68</output>
68   And the average age of each of the two new students= 68/2= 
<gadget id="calculator">68/2</gadget>
<output>34</output>
34 years.   Answer 34 years
<result>C</result>
The average age of a group of 12 students was 20. The average age increased by 2 years when two new students joined the group. What is the average age of the two new students who joined the group?