Linear Programming and logical thinking

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It is quite possible that when you solve a linear programming application you may get fractional values for the decision variables as an optimal solution. For example, if your decision variables are how many trains and buses to run daily to meet expected ridership, your solution may call for 30.37 trains and 100.87 buses. Is that a problem If it is a problem explain why. Also, discuss some possible remedies.
Please explain your reasoning, there is a reasoning it just needs to be expressed. Please make sure that your expression is stated within two paragraphs.