13) Ball-point pens were sold at a loss of 20%. If they
had been sold at 370 more, there would have
been a gain of 3 - %. Find the cost price.
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Answer:
1608.69
Step-by-step explanation:
let c.p = 100%
80% + 370 = 103%
23% = 370 => 100% = 100×370/23
= 1608.69
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