What will come in place of question mark (?) in the following question?

$[\frac{9}{42} \div \frac{81}{63} \times 54 \frac{8}{5} - \frac{5}{8}] = ?$

\frac{413}{20}

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\frac{399}{4}

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\frac{317}{40}

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\frac{317}{40}

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N o n e o f t h e s e

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Solution

The correct option is E $N o n e o f t h e s e$
$? = \frac{9}{42} \times \frac{63}{81} \times 54 + \frac{8}{5} - \frac{5}{8} = 9 - \frac{5}{8} + \frac{8}{5} = \frac{360 - 25 + 64}{40} = \frac{399}{40}$

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