SCERT AP 7th Class Maths Solutions Pdf Chapter 7 Ratio and Proportion Ex 7.6 Textbook Exercise Questions and Answers.
AP State Syllabus 7th Class Maths Solutions 7th Lesson Ratio and Proportion Ex 7.6
Question 1.
A shop selling sewing machines, offers 3% discount on purchases. If the marked price is ₹ 6500. then what is the selling price?
Answer:
Method 1:
Given the marked price = ₹ 6500
bis count = 3%
Disount calculated on marked price.
Discount = 3% of ₹ 6500
∴ Discount = ₹ 195
Selling price
= Marked price – Discount = 6500 – 195
∴ Selling price of sewing machine
= ₹ 6305
Method 2 :
M.P = 100% = ₹ 6500
S.P at a discount of 3%
= (100 – 3)% =?
So, if 100% = 6500
97% = ?
S.P = \(\frac{97}{100}\) × 6500 = ₹ 6305
Question 2.
The marked price of a ceiling fan is ₹ 720 during off season, it is sold for ₹ 684. Determine the discount percentage.
Answer:
Given marked price = ₹ 720
Selling price = ₹ 684
Discount = M.P – S.P = 720 – 684
= ₹ 36
Discount percent = \(\frac{\text { Discount }}{\mathrm{MP}}\) × 100
= 5%
∴ Discount percent = 5%
Question 3.
A publisher gives 32% discount on the printed price of books to book sellers. If the printed price is ₹ 275, then what amount does the seller has to pay to publisher?
Sol. Given printed (marked) price = ₹ 275
Discount percent = 32%
Selling price = M.P – Discount = 275 – 88
∴ Selling price of books = ₹ 187
Question 4.
Rohit buys an item at 25% discount on the marked price. If he bought it for ₹ 660, what is the marked price?
Answer:
Method 1 :
Given selling price = ₹ 660
Discount percentage = 25%
Let the marked price = ₹ x
Marked price – Selling price = Discount
x – 660 = \(\frac{x}{4}\)
∴ Marked price = ₹ 880
Method 2 : M.P = 100% (say)
S.P at a discount of 25% means
S.P = (100 – 25) = 75%
∴ If 75% = ₹ 660 then 100% =?
⇒ SP = \(\frac{100}{75}\) × 660 = ₹ 880