To determine which set of letters in the word "MISSISSIPPI" has equal chances of being selected, we first need to know the frequency of each letter in the word:
- M: 1
- I: 5
- S: 4
- P: 2
Now, let's look at the options:
- M and I: M (1 time) and I (5 times) do not have equal chances.
- M, I, and P: M (1 time), I (5 times), P (2 times) do not have equal chances.
- S and I: S (4 times) and I (5 times) do not have equal chances.
- M and P: M (1 time) and P (2 times) do not have equal chances.
Based on this analysis, none of the sets listed have equal chances to be selected since none of the pairs or groups consist of letters that occur with the same frequency.
If you are looking for sets of letters with equal chances, there don't appear to be any among the options provided. Thus, the answer is that none of the sets have equal chances.