Sum of Rational Numbers with Errors

Very Hard Number Operations Rational Numbers

Consider the rational numbers $$ -\frac{7}{3} $$, $$ \frac{5}{9} $$, and $$ -\frac{11}{6} $$. A student adds these three rational numbers together, but makes an error in their calculations.

What is the correct value of the sum of these three rational numbers?

$$ -\frac{43}{18} $$

$$ -\frac{1}{6} $$

$$ -\frac{25}{18} $$

$$ -\frac{10}{9} $$

Hint

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