Re: Average DS problem  
both the conditions are alone sufficient for finding the average .... 
Re: Average DS problem  
the original answer as given in set is 'C' ,,,, 
Re: Average DS problem  
Hi, Gaurav , kindly elaborate how to arrive at 'C' 
Re: Average DS problem  
X * A1 + Y * A2 / ( X+Y)
A1 & A2 are given in the stem.
Combining st1 & st2 we have the values of (X+Y), X, Y. Put them back in the weighted average equation.
