一道Gmat数学题
Yesterday'sclosingpricesof2,420differentstockslistedonacertainstockexchangewerealldifferentfromtoday'sclosingprices.Thenumberofstocksthatclosedatahigherpricetodaythanyesterdaywas20percentgreaterthanthenumberthatclosedatalowerprice.Howmanyofthestocksclosedatahigherpricetodaythanyesterday?