A) \[\frac{7}{4}\div \frac{4}{7}=\frac{7}{4}\times \frac{4}{7}\]
B) \[\frac{7}{4}+\frac{7}{4}=\frac{4}{18}\]
C) \[\frac{3}{5}+\frac{1}{5}-\frac{2}{5}=\frac{2}{5}\]
D) \[1\div \frac{1}{2}=2\]
E) None of these
Correct Answer: B
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