The average age of 22 students in a group is 12 years. when teacher's age is included to it, the average increases by one.What is the teacher's age in years?
Select
A) 31	B) 36	C) 35	D) 53	E) 57
age of the teacher=(23*13-22*12)= 
<gadget id="calculator">(23*13-22*12)</gadget>
<output>35</output>
35 years.   ANSWER:35
<result>C</result>
The average age of 22 students in a group is 12 years. when teacher's age is included to it, the average increases by one.What is the teacher's age in years?