Probability of success = probability of possible success/Probability of possible success + probability of failure
Since 1/5,000,000 become president
So 1 is success and 5,000,000 failure
To find the probability of the President
Find how many can be president
In the question just 1 because they said 1/5,000,000
So the success is 1 and the failure is 5,000,000
Let us use the rule above
Probability of that event will occur = 1/5,000,000 + 1