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      Question

      Two back-to-back discounts of 25% and 20% are equivalent

      to a single discount of 'd%'. Calculate the value of '2d'
      A 80 Correct Answer Incorrect Answer
      B 65 Correct Answer Incorrect Answer
      C 45 Correct Answer Incorrect Answer
      D 95 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the original cost be Rs. '100b'

      Price after applying both discounts = 0.75 × 0.8 × 100b = Rs. '60b'

      So, 'd' = [(100b - 60b) ÷ 100b] × 100 = 40

      Required value = 40 × 2 = 80

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