As you seem to be the gee gee expert on here you might or might not be interested to know that Lee Westwood won a share of the tote jackpot yesterday at Cheltenham. I know this through following Lee on twitter (being half interested in Golf) - I just wondered a couple of things a) how much did he win (not that I think he needs the cash) b) what the combined odds were (ie how difficult was it)
The answer to b) isn't as simple as adding up the combined odds. It's the amount in the win pool divided by the amount of people who pick all the winners. For example, if a million people enter the Tote Jackpot and pay a pound, the win pool is a million. If then only one person picks all 6 winners, they then win the million. If ten people pick all 6 winners, they obviously divide the million ten ways. Either way, he'll have won a chunk.
There were 3.5 correct selections each winning £10,339.20 (to a £1 stake) from a total prize fund of £36,187 (https://www.scoop6.co.uk/totejackpot/13032018.htm). As @Fonzie says the jackpot is a pool bet but out of interest the combined SPs of the 6 winners work out at 5545/1 (https://www.aceodds.com/bet-calculator/accumulator.html) so the jackpot paid out nearly twice as much as an accumulator would have.