The average monthly income of P and Q is ? 5050. The average monthly income of Q and R is ? 6250 and the average monthly income of P and R is ? 5200, the monthly income of P is 


a) 
? 3500 
b) 
? 4000 
c) 
? 4500 
d) 
None of these 
The average monthly income of P and Q is ? 5050. The average monthly income of Q and R is ? 6250 and the average monthly income of P and R is ? 5200, the monthly income of P is 


a) 
? 3500 
b) 
? 4000 
c) 
? 4500 
d) 
None of these 
Let represents their respective monthly incomes, we have
…(i) 

…(ii) 

…(iii) 
Adding (i), (ii) and (iii), we have 2
⇒
⇒ (using (ii))
⇒
So, the monthly income of is ?. 4000.