SSC CGL 2025 PYQ — Question 65

SSC CGL - 13 Sep 2025 - Shift 1 • Quantitative Aptitude • Q65

From a 100-liter container of pure milk, 20 liters are removed and replaced by water. This process is repeated a total of four times. What is the final quantity of milk remaining in the container?

Show answer & explanation

Correct answer: D

Explanation

The correct answer is option 4 i.e. 40.96 liters.

Final milk left in container = Total quantity of milk × (1−initial quantityTotal quantity)Time(1 - \frac{initial\ quantity}{Total\ quantity})^{Time}

⇒ 100(1 - 20/100)4

⇒ 100 × 256/625 = 40.96 L