i didn't even study for it and i was by no means considered a great student and i passed. it is just common stuff that u know, that u have learned, nothing too
the pn was probably easier cuz u finished all the way through rn school. if u had a years more experience above the rn, u'd probably feel more comfortable and pass the rn then but have a hard time...
i did superior on my eri exit test too and i passed, but there is just no way to know. that test is a monster!!! just study, study, study. u have to feel like like u know ur stuff when u go into that...