Answer
$ n \leq 26$
Yes
Work Step by Step
Lets say we can take $n$ one way rides cheaper than the monthly pass.
The cost for $n$ one way rides will be $0.90 \times n$. Equating this to be less than monthly pass which is $24$ we have $$0.9 n \leq 24.$$ Dividing both sides by $0.9$ we get $$n \leq 26.67.$$ Since the number of trips should be a whole number, we can round the equation as $$ n \leq 26.$$ Therefore, one can go on $26$ one way trips which would cost less than a $24$ dollar monthly pass.
For a person who will regularly commute and require more than $26$ one way rides a month, a monthly pass would be the cheaper option.
If one makes $25$ one way rides, it is cheaper to pay the one way fare.
