Q:
      
      
         
            
There were 24 studentsina class. One of them, who was 18 years old, left the class and his place was filled up by a new comer.Ifthe average of the class was thereby lowered by 1 month, the age of new comer is-
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: C) 16 years         
         
Explanation: Let the age of new comer be x
Avg age decrease by 1/12 year ⇒24 X 1/12 = 18 –x
⇒x=16 years
       
      
      
      
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