Question

one-third of it at a gain of 25%. At what gain per cent must he sell the remainder, so as to make 13) Ball-point pens were sold at a loss of 20%. If they had been sold at 70 more, there would have 1 been a gain of 3-%. Find the cost price. ​

Answer 1

=> Let the CP = x

=> then SP = x - x * 20/100 = 4x/5

=> Now the SP is increased by 70 rs .

=> New SP = 4x/5 + 70

New SP = 4x/5 + 70and in this case we are getting profit of 10/3% .

=> x + x * (10/3) / 100 = 4x/5 + 70

=> or, 31x/30 = 4x/5 + 70

=> or, 7x/30 = 70

=> or , x = 300

Therefore, CP of the article is Rs 300.