A buyer saves Rs 25 due to a 6.66% (i.e., 6 2/3% = 1/15) discount on a textbook. Determine the amount of money (in Rs) actually paid after discount.

Introduction:
Given a discount rate and the rupee saving, you can recover the marked price and then compute the payment after discount.

Given Data / Assumptions:

• Discount rate = 6.66% = 6 2/3% = 1/15 of the marked price (MP).
• Saving (discount amount) = Rs 25.

Concept / Approach:
Discount amount = discount_rate * MP. Amount paid = MP − discount amount.

Step-by-Step Solution:
Let MP = MDiscount = (1/15) * M = 25 ⇒ M = 25 * 15 = 375Amount paid = 375 − 25 = 350

Verification / Alternative check:
6.66% of 375 ≈ 25; 375 − 25 = 350 confirms the payment.

Why Other Options Are Wrong:

• 450 / 225 / 375: these are either MP or unrelated figures, not the net amount paid.

Common Pitfalls:

• Treating 6.66% as 6% or 7% rounding, which miscomputes M.

Final Answer:
350