This has to do with probability, you could buy 100 and still miss at=20 least one. What are the bookie type odds you are willing to risk. I=20 would suspect that with 11.42 the odds are probably better than 90%. It's a good probability you aren't a few miles North near Boulder,=20 Colorado with the probability of many rain drops falling there exceeded=20 any bookie odds I would think. I have a friend there, moved there about=20 a year ago, renting an apartment, bought a house to close (final signing=20 and acceptance) next week, that was damaged beyond feasible repair with=20 the flooding. On 9/14/13 12:05 AM, YES NOPE9 wrote: > Machine Design Magazine had a puzzler...... > A beer company sells beer with 5 different cap liners. > There are equal numbers of each cap liner sold. > How many beers on average must be bought to get all 5 liners ? > > My guess was 11.42... but I wondered if PIClist had a math guru > who knew the correct approach. > Gus in Denver --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .