Question

A shopkeeper sells 6 notebooks for 4 dollars. Compute the equivalent price of 12 notebooks by constructing a table.

• A. 90 dollars
• B. 8 dollars
• C. 10 dollars
• D. 30 dollars

Answer 1

The correct option is B 8 dollars

For the given data, let's create a ratio table.

Notebooks	6
Price (in dollars)	4

The ratio of the number of books to the price is $\frac{6}{4},$ which can be simplified as $\frac{2\times 3}{2\times 2}$.

$=\frac{3}{2}$ or $3:2$

The next entry in the table should be equivalent to 3:2.

Increase the top line by 3 and the bottom line by 2.

Notebooks	6	6+3=9
Price (in dollars)	4	4+2=6

Notebooks	6	9
Price (in dollars)	4	6

The next entry will be

Notebooks	6	9	9+3
Price (in dollars)	4	6	6+2

Notebooks	6	9	12
Price (in dollars)	4	6	8

Hence, the price of 12 notebooks will be 8 dollars.