A tea seller used to make 50% of profit by selling tea at Rs. 9 per cup. When the cost of ingredients increased by 25%, he started selling tea at Rs. 10 per cup. What is his profit percentage now?

A. $$33\frac{2}{3}$$

B. 25

C. $$33\frac{1}{3}$$

D. 30

Answer: Option C

Solution(By Examveda Team)

Selling price of tea = Rs. 9 per cup
Profit % = 50%
∴ Cost price of tea = 9 × $$\frac{{100}}{{150}}$$ = Rs. 6 per cup
New cost price of tea after 25% increased,
New cost price = 6 × $$\frac{{125}}{{100}}$$ = Rs. 7.50
New selling price = Rs. 10
∴ Profit = (10 - 7.5) = Rs 2.50
∴ Profit % $$ = \frac{{2.50}}{{7.50}} \times 100 = 33\frac{1}{3}\% $$