Task: Question Answering
Input (English): Problem: the average monthly income of p and q is rs. 2050. the average monthly income of q and r is rs. 5250 and the average monthly income of p and r is rs. 6200. the monthly income of r is :
Options: a. 5100, b. 4900, c. 9400, d. 1500, e. 3200
Output (English): c