6 tens and 14 exercise books cost rs 162 .5 pens and 8 exercise books cost 102.the ratio of the cost of 1 pen to that of 1 exercise books is
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The cost of single pen would be 12.7 and the cost of single exercise would be 6.14 so adding them up gives u the answer that is.. 18.84
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Hope it would be useful for you
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