One dozen note books quoted at ₹125 are available at 20% discount. How many notebooks can be bought for ₹75?

9

Marked price of 12 notebooks = 125

Discount  = 20%

Selling price of 12 notebooks = 125 × \(\frac{80}{100}\) = 100

Selling price of a notebook = \(\frac{100}{12}\)= \(\frac{25}{3}\)

Number of notebooks bought for 75 = 75 × \(\frac{3}{25}\)= 9