The average age of a class of 22 students is 10 yrs. if the teacher's age is also included, the average increases by one year. Find the age of the teacher Pick one:
A) 30 Years  B) 31 Years  C) 33 Years  D) 34 Years  E) 49 Years
Total age of students is 22X10 = 220 Years   Total age inclusive of teacher = 23X (10+1) = 253   So, Teacher's age is 253-220= 
<gadget id="calculator">253-220</gadget>
<output>33</output>
33 Yrs   There is a shortcut for these type of problems   Teacher's age is 10+(23X1)= 33 Years   33 Years
<result>C</result>
The average age of a class of 22 students is 10 yrs. if the teacher's age is also included, the average increases by one year. Find the age of the teacher