A) \[[\,7\,]\] tens+\[[\,2\,]\]ones
B) \[[\,2\,]\]tens +\[[\,7\,]\] ones
C) \[[\,20\,]\]tens+\[[\,7\,]\]ones
D) \[[\,20\,]\]tens+\[[\,9\,]\]ones
Correct Answer: B
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