જો \(\rm \frac{a}{7}=\frac{b}{11}=\frac{c}{13}\) છે, તો \(\rm \frac{a+b+c}{c}\) નું મૂલ્ય છે:

1
\(\frac{31}{11}\)
2
\(\frac{31}{7}\)
3
\(\frac{7}{13}\)
4
\(\frac{31}{13}\)

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