The average age of a class of 42 students is 16 yrs. if the teacher's age is also included, the average increases by one year. Find the age of the teacher Pick.
A) 30 Years B) 31 Years C) 32 Years D) 34 Years E) 59 Years
Total age of students is 42X16 = 672 Years   Total age inclusive of teacher = 43X (16+1) = 731   So, Teacher's age is 731-672= 
<gadget id="calculator">731-672</gadget>
<output>59</output>
59 Yrs   There is a shortcut for these type of problems   Teacher's age is 16+(43X1)= 59 Years   59 Years
<result>E</result>
The average age of a class of 42 students is 16 yrs. if the teacher's age is also included, the average increases by one year. Find the age of the teacher