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In how many ways can the letters of the word 'LEADER' be arranged?

  • A.72
  • B.144
  • C.360
  • D.720

Answer: C

LEADER has six letters with E appearing twice.

\[ \frac{6!}{2!} = \frac{720}{2} = 360 \]

The division by \( 2! \) removes the double-counting from swapping the two identical E's, which changes nothing visible.

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