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Cost of 36 pens and 42 pencils is ₹ 460/- . What is the cost of 18 pens and 21 pencils ?
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- ₹230/-
- ₹203/-
- ₹302/-
- ₹320/-
- None of these
Correct Option: A
Let us assume 1 pen cost be ₹ x and 1 pencil cost be ₹ y.
According to question,
The Cost of 36 pens and 42 pencils is 460.
36x + 42y = 460 ...................(1)
then the cost of 18 pens and 21 pencils = 18x + 21y.
Now divide the Equation (1) by 2. We will get,
18x + 21y = 230
So the Cost of 18 pens and 21 pencils = 18x + 21y = 230
