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Two-letter arrangements (no letter repeated) are made from the letters of INDORE. How many are there?

Competition practicePermutations & Combinations
  • A15
  • B36
  • C30
  • D12

Step-by-Step Solution

INDORE has 6 different letters. First letter: 6 ways, second: 5 ways. . (36 allows the same letter twice.)
Answer: C) 30

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