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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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