Question

Find the ratio of the price of a pencil to that of a ball pen if pencils cost $Rs.96$ per score and ball pens cost $Rs50.40$ per dozen.

Answer 1

Price of pencil $=Rs.96$ per score
Price of ball pen $=Rs.50.40$ per dozen
Price per unit of pencil $=\frac{96}{20}=4.8$ [Since, $1$ score$=20$ pencils]
Price per unit of ball pen $=\frac{50.40}{12}=4.2$ [Since, $1$ dozen$=12$ pens]

Now, the ratio $=\frac{4.8}{4.2}=\frac{8}{7}$

Therefore, the ratio of price of a pencil and Price of a ball pen is $8:7$.