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Discount

  1. Two successive discounts of 20% and 20% are equivalent to a single discount of
    1. 42%
    2. 40%
    3. 36%
    4. 34%
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    Given, r1 = 20% and r2 = 20%
    ∴ Single discount equal to r1 and r2
    = (r1 + r2 - r1 x r2) / 100 %

    Correct Option: C

    Given, r1 = 20% and r2 = 20%
    ∴ Single discount equal to r1 and r2
    = (r1 + r2 - r1 x r2) / 100 %
    = (20 + 20 - 20 x 20) / 100
    = 40 - 4 = 36%

    Report

  1. On a 20 % discount sale, an article costs 596 . What was the original price of the article ?
    1. ₹ 720
    2. ₹ 735
    3. ₹ 745
    4. ₹ 775
  1. View Hint | View Answer | Workspace | Discuss In Forum | Report

    Let the original price of be N .
    ∴ At discount of 20% article costs ₹ 596
    ∴ 596 = (80 x N)/100

    Correct Option: C

    Let the original price of be N .
    ∴ At discount of 20% article costs ₹ 596
    ∴ 596 = (80 x N)/100
    ⇒ N = (596 x 100)/80
    ∴ N = 745
    ∴ original price = ₹ 745

    Report

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  1. If an electricity bill is paid before due date, one gets a reduction of 4 % on the amount of the bill . By paying the bill before due date, a person got a reduction of ₹ 13 . The amount of his electricity bill was
    1. ₹ 125
    2. ₹ 225
    3. ₹ 325
    4. ₹ 425
  1. View Hint | View Answer | Workspace | Discuss In Forum | Report

    Let amount of electricity bill = ₹ N
    ∴ 4% of N = 13
    ⇒ (4 x N)/100 = 13

    Correct Option: C

    Let amount of electricity bill = ₹ N
    ∴ 4% of N = 13
    ⇒ (4 x N)/100 = 13
    ⇒ N = 13 x 25 = ₹ 325

    Report

  1. Successive discounts of 10%, 20% and 30% is equivalent to single discount of?
    1. 60%
    2. 49.6%
    3. 40.5%
    4. 36%
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    Here, r1 = 10 %, r2 = 20% and r3 = 30%
    ∴ Required discount
    = [1 - (1 - r1/100) (1 - r2/100) (1 - r3/100)] x 100%

    Correct Option: B

    Here, r1 = 10 %, r2 = 20% and r3 = 30%
    ∴ Required discount
    = [1 - (1 - r1/100) (1 - r2/100) (1 - r3/100)] x 100%
    = [1 - (1 -10/100) (1 - 20/100) (1 - 30/100)] x 100%
    = {1 - (9/10) x (4/5) x (7/10)} x 100%
    = (1 - 0.504) x 100% = 49.6%

    Report

  1. A shopkeeper has announced 14% rebate on marked price of an article. If the selling price of the article is ₹ 645, then the marked price of the article will be?
    1. ₹ 800
    2. ₹ 810
    3. ₹ 750
    4. ₹ 775
  1. View Hint | View Answer | Workspace | Discuss In Forum | Report

    Let the marked price of item = ₹ N
    ∴ {(100 - 14) /100 } of N = 645

    Correct Option: C

    Let the marked price of item = ₹ N
    ∴ {(100 - 14) /100 } of N = 645
    ⇒ N = (645 x 100)/86 = ₹ 750

    Report

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