Math Question: In a computer tape library there are two racks with 40 tapes per rack.In a given day 30 tapes are in use . What fraction remains in the rack? Mathematics Interview QuestionAnswer: 5/8 Previous QuestionNext QuestionIf a card punch operator can process 80 cards in half an hour How many cards can this process in 7hr 30min?In a normal distribution, approximately what percentage of the cases, to the nearest whole number, falls within 4 standard deviations of the mean: