Andy recorded the purchase that each customer at a costume store made. His results show: 102 customers purchased no costume, 161 purchased exactly one costume, and 7 purchased more than one costume. What is the probability (in reduced form) that the next person will purchase one or more costumes?

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?