A fruit seller had some Guavas. He sells 80% Guavas and still has 900 Guavas. Originally, number of Guavas, he had:

Correct option is D

He has 900 Guavas left, which is 20% of original stock. Let total = x 20% of x = 900 → (20/100)x = 900 x = 900 × 5 = 4500
Explanation of options: (a) ✘ 6750 is too high, likely based on wrong percentage mapping. (b) ✘ 1125 is close to 25% of 4500, not 20%. (c) ✘ 4050 is incorrect calculation based on 10% error. (d) ✔ 900 is 20% of 4500, making it the correct original quantity.