The probability of the third

"Bannon gave Trump a probability of a third that he might limp to the finish line because of Democratic incompetence; a third that he would be pushed from office under the 25th amendment on grounds of mental incapability; and a third that he would be impeached." (The Guardian.)

Does "a probability of a third" mean that the three foreseen (expected?) events regarding the President's future have equal chance of occurrence, i.e., 33,333(...)%?