Question

pencil are bought at the rate of Rs per dozen and sold at the rate of 2 pencil for 60 p. the total profit or loss in selling 3 1/2 dozen pencils is​

Answer 1

Answer:

Gain percentage is 20%.

A dozen pencils are bought for Rs. 6.

12 pencils are bought for Rs. 6.

Cost price of 12 pencils = Rs. 6

Now each pencil is sold for Rs. 0.60

Selling price of each pencil = Rs. 0.60

Selling price of 12 pencils = 12 × Rs. 0.60

Selling price of 12 pencils = Rs. 7.20

Now we have to calculate the gain or loss percentage,

As the selling price is greater than the cost price , it is a gain.

Gain percentage = \frac{Gain}{Cost \ price}

Cost price

Gain

× 100

Gain = Selling price - Cost price

Gain = 7.2 - 6 = Rs. 1.2

Gain percentage = \frac{1.2}{6}

6

1.2

× 100

Gain percentage = 0.2 × 100

Gain percentage = 20%.

Answer 2

Answer:

Gain percentage is 20%.

A dozen pencils are bought for Rs. 6.

12 pencils are bought for Rs. 6.

Cost price of 12 pencils = Rs. 6

Now each pencil is sold for Rs. 0.60

Selling price of each pencil = Rs. 0.60

Selling price of 12 pencils = 12 × Rs. 0.60

Selling price of 12 pencils = Rs. 7.20

Now we have to calculate the gain or loss percentage,

As the selling price is greater than the cost price , it is a gain.

Gain percentage =

$\frac{Gain}{Cost \ price}$

Cost priceGain × 100

Gain = Selling price - Cost price

Gain = 7.2 - 6 = Rs. 1.2

Gain percentage = 

$\frac{1.2}{6}61.2$

 × 100

Gain percentage = 0.2 × 100

Gain percentage = 20%.

Hope it helps