A) 24
B) 23
C) 20
D) 7
Correct Answer: A
Solution :
\[\frac{28}{35}=\frac{7\times 4}{7\times 5}\,=\frac{4}{5}=\frac{4\times 6}{5\times 6}\,=\frac{24}{30}\] \[\therefore \,\,\,\,\,\square \] Should be replaced by 24.
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