Correct Answer - Option 2 : 33.33%

**Given:**

CP of 3 cups = Rs. 40

CP of other 5 cups = Rs. 60

SP of 3 cups = Rs. 50

**Concept used:**

Gain % = (Profit/C.P.) × 100

Gain = S.P – C.P

**Calculation:**

Total CP of 8 cups = Rs. (40 + 60) = Rs. 100

S.P. of 8 cups = Rs. (50/3) × 8

⇒ Rs. 400/3

⇒ Gain = Rs. [(400/3) – 100]

⇒ Rs. 100/3

⇒ Gain% = [(100/3) ÷ 100] × 100%

⇒ 100/3% = 33.33%

**∴**** K incurred a gain of 33.33%**