To determine the probability of selecting the letter 'O' from the word "SCHOOL," let's follow these steps:
1. Count the total number of letters in "SCHOOL":
The word "SCHOOL" consists of the letters: S, C, H, O, O, L
Thus, the total number of letters is 6.
2. Count the number of times the letter 'O' appears in "SCHOOL":
Looking at the word, we can see that the letter 'O' appears twice.
3. Calculate the probability:
To find the probability of selecting the letter 'O', we divide the number of 'O's by the total number of letters.
[tex]\[
\text{Probability} = \frac{\text{Number of 'O's}}{\text{Total number of letters}} = \frac{2}{6}
\][/tex]
4. Simplify the fraction:
The fraction [tex]\(\frac{2}{6}\)[/tex] can be simplified by dividing both the numerator and the denominator by their greatest common divisor, which is 2.
[tex]\[
\frac{2}{6} = \frac{2 \div 2}{6 \div 2} = \frac{1}{3}
\][/tex]
Therefore, the probability of choosing the letter 'O' from the word "SCHOOL" in its simplest form is [tex]\(\boxed{\frac{1}{3}}\)[/tex].
By referring to the given answer choices, the correct option is:
[tex]\[
\text{D } \frac{1}{3}
\][/tex]