Four pens and six notebooks cost Rs 138. Six pens and four notebooks cost Rs 132. The cost of three pens and eight notebooks is
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2
Answer:
Rs. 156
Step-by-step explanation:
Let the cost of a pen be x and cost of a book be y.
According to the given information,
4x + 6y = 138 => x = (69 - 3y)/2
6x + 4y = 132 => 3x + 2y = 66 => (207-9y)/2 + 2y = 66
=> 207 - 9y + 4y = 132 => 5y = 75 => y = 15 => x = 12
Therefore the required cost would be 3x + 8y = 36 + 120 = Rs. 156
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1
Answer:
This question will come in competitive exams tuition like NTSE Nmms
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