I know the bookies haven't always got things right this year but at the moment the odds on Oddschecker are
Zoe 1/2
Chris 9/4
Pav 9/1
I don't really understand bookie's odds but hubby tried to explain it to me this way:
In Zoe's case, if you put on £2 you only get £1 back (plus your stake), in Chris's case, if you put on £4 you would get £9 (plus stake) and in Pav's case you would get £9 for a £1 bet (plus stake), if they were to be evicted. So Zoe is definitely favourite to go atm.