There are 28 girls in hostel whose average age is decreased by 2 months, when one girl 18 yrs is replaced by a new boy.Find the age of new girl.
Select:
A) 1 year
B) 1 year 2 months
C) 4 years 8 months
D) 3 years
E) None
Total decrease = 28 * 2= 
<gadget id="calculator">28 * 2</gadget>
<output>56</output>
56 months= 4 years 8 months   4 years 8 months
<result>C</result>
There are 28 girls in hostel whose average age is decreased by 2 months, when one girl 18 yrs is replaced by a new boy.Find the age of new girl.