At the beginning of a year ,the owner of a jewel shop raised the pric…

Question

At the beginning of a year ,the owner of a jewel shop raised the price of all the jewels in his shop by x% and lowered them by x%. The price of one jewel after this up and down cycle reduced by Rs. 100. The owner carrie…

Accepted Answer

Option A. 2500. Answer & Solution Answer: Option A Solution: & Let\, the\, original\, price = y, & After\, first\, change,\, it\, becomes, & y × ( 1 + x100 ) & After\, second\, change,\, it\, becomes & y × ( 1 + x100 ) ( 1 - x100 ) & = y ( 1 - ( x100 )^2 ) & Thus, & x^2 × y = 10^6 - - - - ( 1 )…