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Find the cost of Rs. 6400, 10% stock at 15 discount.

Correct answer: A. 5440

  • A. 5440
  • B. 5480
  • C. 6440
  • D. 6480

Explanation

A 15% discount means the cost is 85% of the nominal stock value. Cost = 85/100 x Rs. 6400 = Rs. 5440. The likely trap is option b, Rs. 5480, which results from an incorrect discount calculation.

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Percentages express a quantity as parts per hundred and support calculations involving increases, decreases, discounts, commissions, taxes, and successive changes. Questions require distinguishing percentage change from percentage points and identifying the original value when a final value and its percentage change are given.

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