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\nOptions:\n(A) 30 Years\n(B) 31 Years\n(C) 33 Years\n(D) 34 Years\n(E) 49 Years OK. Let's think. Some random thoughts first:
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Total age of students is 22X10 = 220 Years\nTotal age inclusive of teacher = 23X (10+1) = 253\nSo, Teacher's age is 253-220 = 33 Yrs\nThere is a shortcut for these type of problems\nTeacher's age is 10+(23X1) = 33 Years The answer: (C).
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