Some articles are bought at rate of 12 for Rs.20 and equal number of articles are bought at rate of 15 for Rs.12.If each article is sold at rate of Rs.1.60 per article find overall profit/ loos percentage.(Approx)

First batch: 12 articles for Rs.20, so CP = 20/12 = Rs.5/3 per article. Second batch: 15 articles for Rs.12, so CP = 12/15 = Rs.4/5 per article. Average CP = (5/3 + 4/5)/2 = (25/15 + 12/15)/2 = (37/15)/2 = Rs.37/30 ≈ Rs.1.233 per article. SP = Rs.1.60 per article. Profit = 1.60 - 1.233 = Rs.0.367 per article. Profit % = (0.367/1.233) × 100 ≈ 29.7%. The options are 39%, 14%, 22%, 30%, 42%. 30% is closest to 29.7%, so option D is correct.