Let the C.P. of the article be Rs. x
He makes a profit of 20% Hence S.P.=Rs.120x100=Rs.6x5 If he would buy it at 20% less then
The new C.P. = Rs.x (1−20100)=Rs.×(1−15)=Rs.4x5
If he would sell it for Rs.75 less then the new S.P. = Rs. (6x5−75)
If he gains 25% then the new S.P. = Rs.125100×4x5=Rs.x
Hence 6x5−75=x⇒6x5−x=75⇒x5=75
Hence the required C.P. = Rs. 375