Solutions
Let C. P. of a first article= X Rs.
Let C. P. of a second article = Y Rs.
Gain after selling first article = 25% = 25X/100 = X/4 Rs.
S. P. of first bullock
⇒ 5X = 1500 ⇒ X = 300 Rs
C.P. of first article= Rs 300
C. P. of both article = Rs X + Y
Loss in the second article = 25%
Hence S.P.
Hence
C. P. of second article = Rs. 500
Total C. P. of both article = 300 + 500 = 800
Selling price of first and second article together = 2 × 375 = 750 Rs.
Therefore loss = 800 – 750 = Rs 50
% loss
Alternate approach:

Since there are two different products with different C.P., we have to find C.P.s from the two given S.P.s