Question

7. Naresh bought 4 dozen pencils at 10.80 a dozen and sold them for 80 paise each. Find his sells them at 5 for 13. Find his gain per cent. Mark the cu 1. If CP (a) 2. If CP gain or loss percent.​

Answer 1

Answer:

$\huge \mathfrak \green{Explanation}$

Let the price of a pen in rupees =x

Let the price of a pencil in rupees =y

Let the price of an eraser in rupees =z

Let total money spent by me in rupees =A

Then, the total money spent by Rajan in rupees =32A

With the given details,

5x+7y+4z=A→(1)

6x+14y+8z=32A→(2)

Multiplying (1) by 2 and then subtracting (2) from it,

10x+14y+8z−6x−14y−8z=2A−32A

4x=12A

⇒x=18A

Total amount spent on pens by me =5×A8=58A

Percentage of total amount spent =58×100

=62.5%

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• I hope it was helpful to you :)

$\huge \mathfrak \red{BEBRAINLY}$

Answer 2

cost of one dozen pencils Rs.10.80

∴ cost of 4 dozen pencils =10.80×4

=Rs43.20

Now, Total cost of selling price of the pencils =

100

80×4×12

​

=38.40

Here, we can see that amount of selling price is less than cost price

then,

loss=43.20−38.40

4.80

Now,

loss% =

43.20

4.80

​

×100

=11.11%