Question

If the cost price of 30 notebooks is equal to the
selling price of 40 notebook, find the gain or
loss percent
​

Answer 1

Step-by-step explanation:

Given, the cost price of 30 notebooks is equal to the selling price of 40 notebooks.

Let the cost price of each notebook = Rs. 4

then, the cost price of 30 notebooks = 4x30 = 120

Let the selling price of each notebook = Rs. 3

then, the selling price of 30 notebooks = 3x40 = 120

Loss = cp - sp = 4 - 3 = 1

loss% = loss/cp x 100

= 1/4 x 100 = 25%

Answer 2

Step-by-step explanation:

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