**Take for example the methods used by one or two
U.K. bookies. They bet parlay on various soccer matches by multiplying
the odds. Each event**

**is bet at a percentage of, lets say, 115%. This
translates to a takeout of $13 from every $100 invested, so an average
of $87 is returned in $100.****Let us
say you take a parlay on some soccer matches. Your average return on any
event is going to be $87, but we'll say you are a bit smarter than**

**some and get an average return of $90 in each
$100. So you now have 90% left on the first event, take 10% off the 90%,
leaving 81% on a two match**

**parlay. Take 8.1% off the 81%, leaving 72.9% on
a three match parlay. Take 7.3% off the 72.9%, leaving 65.6% on a four
match parlay. Take 6.5% off the 65.6%, leaving 59.1% on a five match
parlay. Take 5.9% off the 59.1%, leaving 53.2% on a six match parlay,
and on it goes.**

**115% is low compared to the reality of some
soccer books, so we have been conservative with these figures. When you
have to bet a four match parlay**

**and 10% tax is taken out on top, it is a
mathematical fact that usually less than 50% of all the money invested
will be returned to the "investors". These**

**same figures apply to betting all-up on several
races with the totalizator.**