it is a 50-50 chance ,
and if u want to get both i would def put them in the tank together,
then tell your LFS u want a non-coral eating flameangel , when he tells u he has one tell him great and have him put him in a tank with the 2 corals u picked out , then tell him to keep them together and u will be back in 2 days to pick the 3 of them up ,