A seller sells his rice at cost price but uses a faulty weighing machine. The weighing machine reads \(a\%\) less than the actual weight of the rice that is being sold. Find the profit/loss percentage on selling \(10\, kg\) of the rice.

1) If the seller gives a discount of \(10\%,\) then he will incur a loss of \(55\%.\)

2) The cost price per kg is \(5\) dollars.

Answer: A

Source: e-GMAT