\([ \frac{1}{5} + \{\frac{1}{7} of (\frac{25}{42} \;\div \frac{35}{6})\;-(\frac{4}{7}\times \frac{6}{5}\;\div \frac{54}{63})\} \;+ \frac{28}{40}]\) இன் மதிப்பு என்ன ?
1
\({{99} \over 490} \)
2
\({{383} \over 3430} \)
3
\({{393} \over 3430} \)
4
\(\left[{{1} \over 5} + \left\{{{1}\over 7} of \left({{25} \over 42} \div {{35} \over 6}\right) - \left({{4} \over 7} \times {{6} \over 5} \div {{54} \over 63} \right)\right\} + {{28} \over 40} \right] \)