To answer this question, we need to know that probability is the number of successes of an event over the number of given possibilities, or cases possible. We have that the word:
Excellent has 9 letters. Then, we have that the letter, e, appears three times in the word.
Then, we have:
We can see this graphically as follows:
Therefore, the probability of getting the letter, e, out of the word, excellent, is 1/3 (taking into account Capital letter E).
If we discriminate about the Capital letters and lowercase letters, and we need to get the probability for the lowercase letter, e, we only have two lowercase letters, and then we have that the probability is:
In summary:
• If we take into account the first letter as a capital letter, and we only want to know the probability of letter, e, in the word, Excellent, as a lowercase letter, e, we have that the probability of the letter, e, is, 2/9 because there are two lowercase letters, e, in the word Excellent.
• If we do not make any distinction between lowercase and uppercase letters, the letter, e, appears 3 times in the word excellent, so the probability, in this case, is 3/9 = 1/3.