To simplify the expression (√125 + √245 - √5) / √5, we can first simplify the individual square roots:

√125 = √(25 * 5) = √25 * √5 = 5√5
√245 = √(49 * 5) = √49 * √5 = 7√5
√5 remains as √5

Now we can substitute these simplified square roots back into the expression:

(5√5 + 7√5 - √5) / √5

Combining like terms, we get:

(5√5 + 7√5 - √5) / √5 = (5 + 7 - 1)√5 / √5 = 11√5 / √5

Finally, we can simplify the square root in the denominator:

11√5 / √5 = 11

Therefore, (√125 + √245 - √5) / √5 simplifies to 11.