To determine the probability of selecting a vowel letter from the word "MODELS," we first identify the vowels present in the word. The vowels in "MODELS" are:
- O
- E
So there are 2 vowels.
The total number of letters in "MODELS" is 6.
Using the uniform probability model, the probability \( P \) of selecting a vowel is calculated as:
\[ P(\text{vowel}) = \frac{\text{Number of vowels}}{\text{Total number of letters}} = \frac{2}{6} = \frac{1}{3} \]
Therefore, the probability of selecting a vowel letter from the word "MODELS" is:
Start Fraction 1 over 3 End Fraction.