If you do it right most of them will survive. Mangoes are pretty hardy and take bare rooting pretty well. You should trim most of the leave off. Wrap the top in moistened newspaper and then plastic to keep the remaining leaves moist. Use moistened sphagnum moss inside plastic bag around the roots, bind tightly so the moss moistened moss makes good contact with the roots.
More deciding part of success is how you treat them once you get there. Pot them up as soon as possible. Keep them in full shade for a couple days, and then more into filtered sunlight for a couple of weeks. Keep them very well misted while they are recooperating. Good to mist for 5 minutes once per hour first couple days. Good luck!