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What is the ratio of the price of a pencil to that of a ball pen if pencils cost ₹ 96 per score and ball pens cost ₹ 50.40 per dozen?

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8:7

7:8

7:7

9:8

answer is A.

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Detailed Solution

Given, the price of a pencil to that of a ball pen if pencils cost ₹ 96 per score and ball pens cost ₹ 50.40 per dozen.
1 score= 20
1 dozen= 12
By using the unitary method,

Cost of 1 item = cost of all item number of items

The price of a pencil is

\frac{96}{20} = 4.8

.
The price of a ball pen is

\frac{50.40}{12} = 4.2

.
The ratio of their prices is

\frac{4.8}{4.2} = \frac{8}{7}

.
Hence, option 1 is correct.

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