It is possible to pass all three in one attempt. Since all 3 are calculation papers however, you will need to put in the time and effort into studying. If you only wish to do 2, I would advise you to put in for F5 and F9. They are similar papers (but not the same) and by leaving F7 for last, you can attempt it with P1 and/or P3 and then do P2 the sitting right after so that the information from F7 will still be fresh with you.