Sum of three fractions

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\(\frac{1}{2}+\frac{1}{4}+\frac{1}{6}=?\)
\(\frac{7}{12}\)
\(\frac{5}{12}\)
\(\frac{3}{12}\)
\(\frac{1}{12}\)
\(\frac{11}{12}\)

Calculator
Hint \(\frac{1}{2}+\frac{1}{4}+\frac{1}{6}\)
\(=\frac{1\times{6}}{2\times{6}}+\frac{1\times{3}}{4\times{3}}+\frac{1\times{2}}{6\times{2}}\)
\(=\frac{6}{12}+\frac{3}{12}+\frac{2}{12}\)
\(=\frac{6+3+2}{12}\)
\(=\frac{11}{12}\)
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