Discussion Forum : True Discount
Question -
The marked price of a watch was Rs.720/-. A man bought the same for Rs.550.80, after getting two successive discounts, the first at 10%. What was the second discount rate?
Answer: Option B
Answer: (b)Marked price = Rs.720Actual price = Rs.550.80First discount = 10%Let the second discount be x%Then, we can write720 (1 - 0.10) (1–0.01x) = 550.80720 × 0.9 (1– 0.01x) = 550.8648 (1 - 0.01x) = 550.81 - 0.01 x= ${550.8}/648$0.01 x = $1 - {550.8}/648$$x = {1 - 0.85}/{0.01}$x = 0.15 × 100 ⇒ x= 15Second discount = 15%
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Answer: (b)Marked price = Rs.720Actual price = Rs.550.80First discount = 10%Let the second discount be x%Then, we can write720 (1 - 0.10) (1–0.01x) = 550.80720 × 0.9 (1– 0.01x) = 550.8648 (1 - 0.01x) = 550.81 - 0.01 x= ${550.8}/648$0.01 x = $1 - {550.8}/648$$x = {1 - 0.85}/{0.01}$x = 0.15 × 100 ⇒ x= 15Second discount = 15%
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