If you invested a pound on a horse, then the amount of money you'd expect to get back would depend on the odds that that horse was offered at, but if you confined yourself to horses that had a reasonable chance of winning, say, the sort of horses that tend to be offered at odds of, say, six or seven to one or better, then your average rate of return might be nearer ninety per cent than thirty per cent, so putting it one way betting a pound a week on the horses is a slower way of losing your money than betting a pound a week on football pools, but football pools gives you a much greater chance of winning an absolutely astonishing sum of money.