In a clothes shop, jeans have a marked price of $30, but a sign says ‘Two for $50 or 20% off the marked price’. What is the better deal if we want to buy two pairs?
the price when using two for $50=$50 the price when using 20% off the marked price=30×80%×2=$48 as $48<$50 so the better deal is 20%off the marked price
