Final answer:
The statement P(orange) is true because the word 'orange' contains the letter 'a'.
Step-by-step explanation:
The student has asked about the truth value of the statement P(x), which is defined as "the word x contains the letter a." When applied to the word "orange," we need to determine if the statement P(orange) is true or false.
The word "orange" does indeed contain the letter "a", therefore, the truth value of P(orange) is true.