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One pencil costs Rs. $2$ and one fountain pen costs Rs. $15$ . Among the following choices, find the cost of $x$ pencils and $y$ fountain pens.

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2 x + 15 y

15 x + 2 y

13 x + 2 y

2 x − 13 y

answer is A.

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Detailed Solution

Given that, the cost of one pencil is Rs.2.
Cost of one fountain pen is Rs.15.
Cost of

x

pencils means

x

is multiplied with the cost of one pencil.

1

pencils cost Rs.2.

1

fountain pen costs Rs.15.
Total cost of

x

pencil is,

2 × x

= 2x
Total cost of

y

pencil is,

15 × y

= 15y
Total costs of

x

pencils and

y

fountain pens is,

2 x + 15 y

Total cost is

2 x + 15 y

.
Hence, option 1) is correct.

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