The cost of 12 pens and 7 pencils is ₹233. If the cost of a pen decreases by 1.50 and the cost of a pencil increases by 1, then the cost of 2 pens and 3 pencils is ₹48. What is the original cost of 4 pens and 1 pencil?

1
₹74
2
77
3
78
4
71

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