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The cost of 21 pencils and 9 clippers is Rs.819. What is the total cost of 7 pencils and 3 clippers together?

 A) Rs.204 B) Rs.409 C) Rs.273 D) Rs.208

 C) Rs.273

Let cost of 1 pencil and 1 clipper be p and c, respectively

Now. according to the question,

$$\Large 21p + 9c = Rs.819$$

$$\Large 3 \left(7p+3c\right)= Rs.819$$

$$\Large 7p + 3c = Rs.273$$

Cost of 7 pencils and 3 clippers = Rs.273.

Part of solved Linear Equations questions and answers : >> Aptitude >> Linear Equations

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