1) The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is : A) 10 years B) 15.5 years C) 16 years D) Data inadequate Answer: Option DExplanation:Clearly to find the average we ought to know the number of boys ,girls or students in the class ,neither of which has been given .So,the data provided is inadequate.
