Plugga,

* means multiply, / means divide and you do the bits in the brackets first. So if we look at the first example I had:

0.3333*0.1667/(1-0.3333) + 0.1667/0.3333/(1-0.1667)

So we can work out the first half of the equation first. Do the bracketed bit first

(1-0.3333) = 0.6667

So now we have:

0.3333*0.1667/0.6667

Now just key that into your calculator as:

0.3333 MULTIPLY 0.1667 DIVIDE 0.6667

You should get 0.0833 (rounding off the excess decimal places)

Now you can do the same for the second half doing the brackets first (1-0.1667)=0.8333 Put that in the equation and we have 0.1667 MULTIPLY 0.3333 DIVIDE 0.8333 should give 0.0667.

Now add the two parts together:
0.0833 + 0.0667 = 0.15

So there is a 15% chance of the quinella - to get the TAB price just divide 1 by this value - ie. 1 DIVIDE 0.15 = $6.67


I don't know of any programs around that work this out automatically - you could do it in a spreadsheet. If enough people were interested I could setup a spreadsheet where you just enter the odds and it works out Quinella, Exacta, Trifecta, First4 approximates, etc. Alternatively I could write a program that would download the odds from NSW site and display approximates for your selected options. If people are interested post a message with the type of info you would like and I can see what can be done.

Finally I don't know about fixed odds quinellas - I have never heard of them but I don't bet at the track so I could be wrong.

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"Computers can do that????" - Homer Simpson