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BITSAT2009MathematicsBinomial TheoremActual

The letters of the word TOUGH are written in all possible orders and these words are written out as in a dictionary, then the rank of the word TOUGH is

Options

  1. A120
  2. B88
  3. C89
  4. D90

Correct answer

C. 89

Step-by-step solution

( aligned & Rank =(4 ! 3)+(3 ! 2)+(2 ! 2)+1 & =72+12+4+1=89 aligned )

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