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Cost of 20 pens and 17 pencils is Rs. 418. What is the cost of 60 pens and 51 pencils ?
- ARs. 1.251
- BRs. 1.257
- CRs. 1,227
- DRs. 1,221
Answer not set
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Solution
C.P. of 1 pen = Rs. $x$
C.P. of 1 pencil = Rs. $y$
=> $20x + 17y = 418$
Multiplying above equations by 3
$\therefore$ $60x + 51y = 1254$
C.P. of 1 pen = Rs. $x$
C.P. of 1 pencil = Rs. $y$
=> $20x + 17y = 418$
Multiplying above equations by 3
$\therefore$ $60x + 51y = 1254$