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NTA Abhyas JEE Main2020MathematicsPermutation and CombinationPractice

The number of ways in which letters of the word ‘ARRANGE’ can be arranged, such that no two R’s are together, is

Options

  1. A160
  2. B200
  3. C360
  4. D900

Correct answer

D. 900

Step-by-step solution

AANGE can be arranged in 5 ! 2 ! = 60 ways Six gaps will be created, two can be selected in C 2 6 ways where two R’s can be arranged in one way So, required number of ways = 6 × 5 2 × 60 = 15 × 60 = 900

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