Final answer:
The price of one book is 2625 Lebanese pounds (L.L.), which is half the price of a stylo that costs 5250 L.L.
Step-by-step explanation:
The student's question asks for the price of one book given that the book costs half the price of a stylo, and Sami bought two stylos at a price of 5250 L.L. each. To find the price of the book, we will use the information that the book is half the price of a stylo. Since one stylo is 5250 L.L., the book would cost half of that, which is 5250 L.L. ÷ 2. Therefore, the calculation is:
5250 L.L. ÷ 2 = 2625 L.L.
So, the price of one book is 2625 Lebanese pounds (L.L.).