Ah! I think they mean that the three have to be compared equally. even/even, odd/odd, odd/even have to be compared equally – that we *don’t* get ‘double the chance” with odd/even simply because odd/even = even/odd ? Maybe something like that? Or maybe it’s the field goal thing…

Ah! I think they mean that the three have to be compared equally. even/even, odd/odd, odd/even have to be compared equally – that we *don’t* get ‘double the chance” with odd/even simply because odd/even = even/odd ? Maybe something like that? Or maybe it’s the field goal thing…

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I suspect it balances out to 50% because you have four combinations:

odd+odd = even
even+even = even
odd+even = odd
even+odd = odd

So, the evens and odds balance each other out.

The mistake I made in thinking that *maybe* odd was more common, is forgetting that I can’t just do “odd+even” without also doing “even+odd”.

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even-odd

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