Correct Answer - Option 3 : 15 : 8

**Given:**

X starts a business with Rs.25,000

After 4 months Y joins him with Rs.20,000

**Concept used:**

Profit ratio between X and Y = Ratio of (investment × time of investment)

**Calculation:**

Time of investment of X = 12 months

Time of investment of X = 8 months

Profit ratio of X and Y = (12 × 25,000) ∶ (8 × 20,000) = 15 ∶ 8

**∴ Profit ratio of X and Y is 15 ∶ 8.**