Find the mode of the following frequency distribution:
Class $20-30$ $30-40$ $40-50$ $50-60$ $60-70$ $70-80$ $80-90$
Frequency $8$ $12$ $27$ $43$ $55$ $37$ $18$

  • A
    $640$
  • B
    $62$
  • C
    $63$
  • D
    $64$

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