The average weight of 8 articles increases by 2.5 kg when a new article comes in place of one of those weighing 65 kg. The weight of the new article is- 8 वस्तुओं का औसत भार 2.5 किग्रा. बढ़ जाता है जब एक नयी वस्तु उनमें से एक के स्थान पर आ जाती है जिसका भार 65 किग्रा. है। नयी वस्तु का भार है-

When one 65 kg article is replaced, the average increases by 2.5 kg for 8 articles. Total increase = 8 × 2.5 = 20 kg. This means the new article weighs 20 kg more than the old one: New weight = 65 + 20 = 85 kg. Option A (84 kg) would only give a 1.93 kg increase, not 2.5 kg. Options C and D (76 kg, 76.5 kg) are less than the original weight and would decrease the average.