Page 118 - ICSE Math 7

4. A table was sold for ` 900 at a loss of 25%. If the same table was sold for ` 950, what would
have been the profit or loss per cent?
5. A bookseller sold 200 copies of a book at a loss of 5%. If each copy costs him ` 40, find the
selling price of the book.

6. Sia bought a laptop for ` 35,000. At what price should she sell it to make a profit of 8%?
7. Mr Roy bought a car for ` 85,800. He spent ` 20,200 on its stereo and other accessories and then
sold it at a profit of 15%. Find the selling price of the car.
8. If the selling price of 8 oranges is equal to the cost price of 12 oranges, find the profit per cent.

9. A shopkeeper buys 40 erasers for ` 240 and sells them at the rate of 30 erasers for ` 165. Find
his profit or loss per cent.
10. If 22% is lost by selling a mobile phone for ` 21,840, what did it cost?
11. A man sold two watches for ` 6,000 each. On one watch he gains 20% and on the other he loses
20%. What is his net gain or loss per cent?

Marked Price and Discount

Marked price of an article is the price which is written or printed on an article or on the price tag
attached to the article. We write M.P. as the short form of marked price. Marked price is also known
as listed price.
Discount is the price deducted from the marked price of an article to lower the selling price. Discount
is the difference between the marked price and the selling price. Discount may be offered as a sum of
money or as a percentage of the marked price. For example, discount can be of ` 10 on the marked
price or 10% on the marked price.

Discount
S.P. = M.P. – Discount and Discount% = × 100%
Marked price
Example 10: A dealer marks a television for ` 32,000 and gives a discount of 25% on all electrical
items. Find the selling price of the television.
Solution: Marked price = ` 32,000
Discount = 25% of ` 32,000

25
= × ` 32,000 = ` 8,000
100
\ S.P. = ` 32,000 – ` 8,000 = ` 24,000
Example 11: Akriti bought a shawl from an exhibition for ` 14,300 after a discount of 20%. What
was the listed price of the shawl?
Solution: Let the listed price be ` x.

Discount = 20% of ` x
20 x
= 100 × ` x = `
5
As S.P. = M.P. – Discount
x
\ 14,300 = x –
5
4x
⇒ 14,300 =
5

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