Sum of fractions given sum of denominators and count

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I am summing the reciprocal values of a range of integers.

ex.

2,6,4

would give:

Result =$\frac{1}{2}$+$\frac{1}{6}$+$\frac{1}{4}$ = $\frac{11}{12}$

My question
Could I arrive at the same result given just the sum of the integers (12) and the number of integers (3)?

From the place where I am to do the calculation, that is the only two pieces of information that I have available right now.

Sorry if its super obvious.

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No,if we take $3,4,5$ then $3+4+5=12$ but $$\frac{1}{3}+\frac{1}{4}+\frac{1}{5}=\frac{20+15+12}{60}=\frac{47}{60}\neq\frac{11}{12}$$